检索结果-内蒙古大学图书馆

Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Han, Haochen Hu, Yongjian Zhang, Yong Sun, Qi Sun, Chengqin Fang, Zhimeng Chen, Haoweu CNPC Engineering and Technology R&D Company

ISBN: (纸本)9781613997345

Well depth is one of the most valuable parameters in drilling engineering. Commonly well depth is calculated by the absolute difference in height based on the revolution of drawwork sensor, which is a pulse encoder or incremental optical encoder. Both encoders have complicated calibration process, and the measurement is easily disturbed. different from the traditional indirect measurement from the drawwork sensor, the direct measurement provided by laser distance device can simplify the process and decrease the systemic error. The principle of the measurement is to calculate the distance by the product of the atmospheric refraction coefficient and the speed of light. In our design, we fixed the laser distance device on the hook and placed the reflector under the crown to measure the height variant. Modern industrial laser distance device with high accuracy can finish multiple measurements per unit time and calculate the average to reduce the measurement error effectively. The well depth measurement system software based on laser distance measuring device can shorten and simplify the calibration process or even realize automatic calibration. The laser distance measuring device can be used effectively in the severe weather, such as strong winds, and minimize the error caused by manual operation. We completed the optimization of laser distance sensor and selected Sick dL 100 as the main laser sensor, as well as a laser measurement prototype in lab. After thousands of trials and errors, it turns out to be applicable. In order to be compatible with the new well depth measurement system, we developed a corresponding software *** Framework and WPF. With the help *** framework and WPF, UI and core codes of the software are separated in physical isolation, which can improve the development efficiency and make preparation for further extension and optimization. The software supports portal communication and ethernet, which can connect with the laser distance device conv

关键词： Signal encoding

来源：评论

学校读者我要写书评

暂无评论

Evaluation of dynamic inter-well connectivity by using the state-variable-capacitance model

引用

Petroleum Science 2025年

作者： Li-Wen Guo Shi-Yuan Qu Yuan-Yuan Lei Zhi-Hong Kang Shuo-Liang Wang School of Energy Resources China University of Geosciences Beijing 100083 China CNPC Engineering Technology R&D Company Limited Beijing 100083 China

during oilfield development, a comprehensive model for assessing inter-well connectivity and connected volume within reservoirs is crucial. Traditional capacitance (TC) models, widely used in inter-well data analysis, face challenges when dealing with rapidly changing reservoir conditions over time. Additionally, TC models struggle with complex, random noise primarily caused by measurement errors in production and injection rates. To address these challenges, this study introduces a dynamic capacitance model (SV-dC) based on state variables. By integrating the extended Kalman filter (EKF) algorithm, the SV-dC model provides more flexible predictions of inter-well connectivity and time-lag efficiency compared to the TC model. The robustness of the SV-dC model is verified by comparing relative errors between preset and calculated values through Monte Carlo simulations. Sensitivity analysis was performed to compare the model performance with the benchmark, using the Qinhuangdao Oilfield as a case study. The results show that the SV-dC model accurately predicts water breakthrough times. Increases in the liquid production index and water cut in two typical wells indicate the development time of ineffective circulation channels, further confirming the accuracy and reliability of the model. The SV-dC model offers significant advantages in addressing complex, dynamic oilfield production scenarios and serves as a valuable tool for the efficient and precise planning and management of future oilfield developments.

关键词： Capacitance model Inter-well connectivity Time-lag coefficient Connected volume reservoir simulation

来源：评论

学校读者我要写书评

暂无评论

An Artificial Intelligence Algorithm for the real-Time Early detection of Sticking Phenomena in Horizontal Shale Gas Wells

引用

Fluid dynamics & Materials Processing 2023年第10期19卷 2569-2578页

作者： Qing Wang Haige Wang Hongchun Huang Lubin Zhuo Guodong Ji CNPC Engineering Technology R&D Company Limited Planning and Support InstituteBeijing102206China

Sticking is the most serious cause of failure in complex drilling *** the present work a novel“early warning”method based on an artiﬁcial intelligence algorithm is proposed to overcome some of the known pro-blems associated with existing sticking-identiﬁcation *** method is tested against a practical case study(Southern Sichuan shale gas drilling operations).It is shown that the twelve sets of sticking fault diagnostic results obtained from a simulation are all consistent with the actual downhole state;furthermore,the results from four groups of veriﬁcation samples are also consistent with the actual downhole *** shows that the pro-posed training-based model can effectively be applied to practical situations.

关键词： Shale gas drilling sticking fault artificial intelligence risk early warning technology

来源：评论

学校读者我要写书评

暂无评论

Implementing managed pressure drilling technique in drilling an offshore exploration well

Implementing managed pressure drilling technique in drilling...

引用

Offshore technology Conference Asia 2020, OTCA 2020

作者： Cai, Xiao Guo, Qingfeng Zhao, Qing CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613996812

The managed pressure drilling technique has been widely applied in land to solve different technical and well control issues as well as ensuring the safety of field personnel. Offshore exploration drilling is one of the most challenging operations due to its nature of drilling hazards and facing environment. There is a great need of applying managed pressure technique in offshore drilling. A new MPd equipment is developed, which is named as pressure control drilling system (PCdS), and performs its first application in offshore drilling to reach its further potential. The PCdS is applied in an exploration well located in the gulf of Bohai to perform a near-balanced drilling operation for the purpose of reducing the density of drilling fluid. It utilizes the microflux control technique to precisely monitor the wellbore condition and detect the overflow and loss of circulation in time. The technique of constant bottom hole pressure is used by the PCdS to maintain the bottom hole pressure constant and minimize the fluctuations of bottom hole pressure during making connections and round trip, enhancing the drilling performance. The equivalent circulating density of 1.08-1.09 g/cm3 is obtained by the proposed PCdS using the solid-free drilling fluid with a density of 1.03g/cm3. While nearby wells use the drilling fluid with the density of 1.15-1.20 g/cm3 at the same Stratum. Cooperated with the drilling fluid of lower density, utilization of the proposed pressure control drilling system significantly avoids the formation damage. The chip hold-down effect is minimized by the proposed PCdS to increase the rOP. The average rOP of nearby wells is 4.02 m/h. While the average rOP of the well using the proposed PCdS is 7.23 m/h, indicating the increase of 80 percent. With the assistance of the proposed PCdS, the drilling team set a single bit footage record of 312.88 m and daily footage record of 163 m, which demonstrates a great improvement of operation efficiency. No drilling

关键词： drilling fluids

来源：评论

学校读者我要写书评

暂无评论

A novel characterization and evaluation method of flow field and its application

A novel characterization and evaluation method of flow field...

引用

Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Qiao, Yan Yang, Xiangtong Zhang, Yang Wang, Yonghong Hou, Tengfei Huang, Bo Shang, Litao Li, Huili CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613997345

At present, most of the oil fields in eastern China have entered the stage of high water cut development, with a comprehensive water cut of over 90% and an oil recovery of less than 30%. To improve oil recovery, the flow field must be described qualitatively and quantitatively, so as to provide a basis for the formulation of measures. This paper proposes two categories of indicators: one is a guideline for developing measures, including streamline bundle properties, and the other is an indicator for evaluating the effects of measures, remaining oil dispersion (rOd) and dynamic heterogeneity included. Through numerical simulation methods, the regularity research and adaptive evaluation of each flow field characterization indicator are carried out. Finally, according to the streamline bundle properties of block E, the liquid rate of injection and production wells were optimized, and the effectiveness of the optimization was evaluated. The study found that under the condition of fixed well pattern, the streamline bundle flow (SF) between wells is relatively stable, and the change in streamline bundle potential (SP) and streamline bundle oil cut (SOC) tends to decrease with time. The typical curve of rOd generally includes four stages, and the effectiveness of measures is judged by the trend of rOd. For dynamic heterogeneity, the change curve generally includes unstable stage and stable stage. The value of the stable stage value can reflect the heterogeneity of the flow field. The larger the value, the stronger the heterogeneity of the flow field. According to the streamline bundle properties, three liquid rate optimization strategies, which are streamline bundle flow method (SFM), streamline bundle potential method (SPM), and streamline bundle oil cut method (SOM), are proposed, and the effectiveness of the measures is evaluated using rOd and dynamic heterogeneity. After liquid rate optimization, the rOd of the reservoir in Block E increased and decreased later, the Lo

关键词： Flow fields

来源：评论

学校读者我要写书评

暂无评论

research of drilling and completion technologies for heavy oil in venezuela and offshore presalt hydrocarbons in Brazil

Research of drilling and completion technologies for heavy o...

引用

SPE Middle East Oil and Gas Show and Conference 2019, MEOS 2019

作者： Fu, Jin Wang, Xi Zhang, Shunyuan Chen, Chen CNPC Engineering Technology R&D Company Ltd

Located in south of Eastern Venezuela Basin, Orinoco Oilfield is an onshore heavy oil field in South America. The heavy oil is known for its high content of acids, heavy metals and asphaltenes with a viscosity of 1000-10000mPa·s. According to the reserve report released by PdVSA by the end of 2016, JUNIN Block that is situated in east of Orinoco Oilfield has an OOIP of 178*108bbl. data of drilled wells and distances between offset horizontal intervals in Orinoco were both studied to improve ultimate production rates. 3-dimension borehole trajectories were designed and the most effective anti-collision measures were taken. After optimziation 8-12 horizontal wells are distributed on one pad. As the horizontal interval extends, the stable production time is prolonged and the accumulative production per well improves. However, the recovery rate stops increasing when the horizontal interval is over 1600m in JUNIN Block. Economically a large space between offset horizontal intervals results in fewer wells and lower costs, but a smaller space contributes to a higher production efficiency per well. If the space exceeds 600m, the accumulative production rate increases much more slightly. A three-dimension well trajectory consists of a vertical interval, an angle building interval, an angle holding interval, an angle building & direction changing interval, a direction turning interval as well as an absolute horizontal interval. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin after Campos Basin, where there are 9 oil fields ranking among the top 20 offshore oil fields in terms of OOIP. By June 2017 over 160×104bbl oil and gas were produced per day in deep water of Santos Basin, taking up 57.1% of the total yield of Cam

关键词： Offshore oil well production

来源：评论

学校读者我要写书评

暂无评论

research on engineering technologies to develop China's complex reservoirs and their feasibility in development of marginal oilfields in South America

Research on engineering technologies to develop China's comp...

引用

Offshore technology Conference Brasil 2019, OTCB 2019

作者： Fu, Jin Wang, Xi Zhang, Shunyuan Liu, Bingshan Chen, Chen Yang, Guobin CNPC Engineering Technology R&D Company Ltd

ISBN: (纸本)9781613996713

Marginal Oilfields are refered to as those oilfields that are hardly developed efficiently with current technical and ecomonical conditions, characterized as high costs of development and low profit margins. However, under certain economical and technical circumstances, marginal oilfields may be transferred to be conventional ones. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin. cnpc signed a cooperation contract with Petrobras in 2013, taking 10% of the total shares. How to efficiently develop the oilfield has been a challenging issue. Technologies of smart water injection in Shengli Oilfield have been studied, while the field development and environment (deep water) of Libra Oilfield have been analyzed, in order that the smart water injection technologies may be modified to develop the marginal oilfield more efficiently. different from conventional zonal water injection technologies, the remote wireless control water injection technologies take advantages of packers that are connected with each other via preset cables, which achieves downhole testing and water injection simultaneously. Being run via tubing, the water injection string locates a nozzle for each reservoir that is isolated by a packer. All nozzles are connected with packers via the preset cables that work as power lines for the whole string, so that downhole data such as pressures, flows and temperatures are all transferred to the processing computer on the surface. The computer program is used to convert pressure and formation signals into curves that are transferred to company via WIFI or mobile 2G/3G/4G webs, in order that technicians there may understand and learn about downhole pressures, temperatures, flows and nozzle conditions in real

关键词： Offshore oil well production

来源：评论

学校读者我要写书评

暂无评论

Experiment on Mechanical Properties and Seepage Capability of deep Tight Sandstone under True-Triaxial Stresses Environment

Experiment on Mechanical Properties and Seepage Capability o...

引用

2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Li, Jiaying Qi, Chunyan Gu, Ye Ye, Yu Zhao, Jie CNPC Engineering Technology R&D Company Limited CNPC Tarim Oilfield Company

ISBN: (纸本)9781613998342

The characteristics of seepage capability and rock strain during reservoir depletion are important for reservoir recovery, which would significantly influence production strategy optimization. The Cretaceous deep natural gas reservoirs in Keshen Gasfield in Tarim Basin are mainly buried over 5000 m, featuring with ultra-low permeability, developed natural fractures and complex in-situ stress states. However, there is no comprehensive study on the variation of mechanical properties and seepage capability of this gas reservoir under in-situ stress conditions and most studies on stress-sensitivity are conducted under conventional triaxial or uniaxial stress conditions, which cannot truly represent in-situ stress environment. In this work, Cretaceous tight sandstone in Keshen Gasfield was tested under true-triaxial stresses conditions by an advanced geophysical imaging true-triaxial testing system to study the stress-sensitivity and anisotropy of rock stress-strain behavior, porosity and permeability. Four groups of sandstone samples are prepared as the size of 80mm×80mm×80mm, three of which are artificially fractured with different angle (0°,15°，30°) to simulate hydraulic fracturing. The test results corresponding to different samples are compared to further reveal the influence of the fracture angle on rock mechanical properties and seepage capability. The samples are in elastic strain during reservoir depletion, showing an apparent correlation with fracture angles. The porosity decreases linearly with stress loading, where the decrease rate of effective porosity of fracture samples is significantly higher than that of intact samples. The permeabilities decrease exponentially and show significant anisotropy in different principal stress directions, especially in σH direction. The mechanical properties and seepage capability of deep tight sandstone are successfully tested under true-triaxial stresses conditions in this work, which reveals the stress-sensitivity of anis

关键词： Porosity

来源：评论

学校读者我要写书评

暂无评论

Technical and risk assessment of underground gas storage construction and operation in China and Caspian region

Technical and risk assessment of underground gas storage con...

引用

SPE russian Petroleum technology Conference 2019, rPTC 2019

作者： Fu, Jin Wang, Xi Chen, Chen Chen, Haowei Zhang, Shunyuan Liu, Bingshan CNPC Engineering Technology R&D Company Ltd

ISBN: (纸本)9781613996928

Since China proposed "Belt and road" initiative in 2013, Caspian countries have become a crucial region for oil and gas cooperation. However, it has been a common technical issue to develop presalt oil and gas resevoirs in the world. Caspian region is known for the wide-spread thick salt-gypsum formations. In China some old wells that were depleted due to engineering difficulties arising from presalt formations started to be developed as underground gas storages. The crude oil price has been keeping at a low level in recent years, which made China's government put more efforts in the development of underground oil storages in depleted salt caverns. As the largest project of underground gas storages, Jintan gas storage construction project successfully made best use of depleted salt caverns. A Sonar test was applied on 4 Jintan underground salt caverns that are 900m deep and 1000m away from the surface in order to reveal their shapes. Salt and muddy salt rocks were collected in Jintan as samples to be analyzed in 3-axis pressure tests. Numerical results with finite element method (FEM) code ABAQUS were studied to approach the creep behaviors of caverns and rock pillars. The pressure arch model and the most dangerous sliding surface model were both utilized to optimize geometric parameters of the upper and lower walls of dissolved cavities. Creep happens on salt rocks under deviator stress, which has non-linear relationship with time. In the simulated gas storage process the internal pressure went up to 14.0 MPa within 3 months but dropped to 7.0MPa in the following 3 months. The above condition may last for 9.5 years in real scenarios. Surrounding rocks of caverns deformed during construction but the most obvious creep was found at their tops and bottoms. Within 10 years salt pillars between caverns are under high deviator stress, thus their creep is the most serious. Surrounding rocks become unstable as the internal pressure of caverns decreases. The creep scope of

关键词： Caves

来源：评论

学校读者我要写书评

暂无评论

research on radial drilling technology of high efficient rock breaking under high temperature deep well conditions

Research on radial drilling technology of high efficient roc...

引用

Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Chen, Zhi Zhu, Feng Hu, Qiangfa Zhang, Youjun Lv, Weiping CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613997345

The current radial well operation technology can not adapt to high temperature, and the long tripping period and low drilling efficiency in deep well *** to the characteristics of abrasive jet, a new radial drilling method is proposed in this paper, in which the abrasive jet is conveyed to the underground by CT (coiled tubing), the casing is sidetracked first, and then the formation is drilled. The working procedure is that using the CT to run the positioning and guiding tool in hole first, and then using the CT to run a steel tube in hole. When the steel tube reaches the deflector, it makes a radial turn, and the ground equipment transfers the abrasive drilling fluid to down hole through the CT. during the operation, the casing sidetracking is completed with drilling fluid with high abrasive concentration, then the abrasive concentration is reduced, and the steel tube enters the formation to complete the radial drilling. Practice has proved that when the well temperature exceeds 100°C the jet hose is easy to be damaged under high temperature and high pressure environment, resulting in leakage of drilling fluid and unable to complete the operation normally. It is necessary to select a suitable temperature-resistant jet hose. Practice has proved that when the well depth is more than 4000 meters, the pressure loss along the system increases and the jet water power from the nozzle decreases. For hard formation, the water jet is not enough for rock breaking drilling in the formation. The results show that under the same water power condition, abrasive jet has stronger ability to break rock and penetrate hard stratum than water jet because it contains solid particles with higher hardness and density. At the same time, the abrasive water jet with suitable abrasive concentration and water power can be used for casing sidetracking. The casing sidetracking and formation drilling are combined to simplify the process. Experiments show that the types of abrasiv

关键词： rocks

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：