石油钻探技术最新文献

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Real Time Inversion and Field Test of LWD Azimuthal Electromagnetic Waves Based on Quasi-Newton Method 基于准牛顿法的随钻方位电磁波实时反演及现场试验

石油钻探技术 Pub Date : 2020-01-01 DOI: 10.11911/SYZTJS.2020025

杨震, 于其蛟, 马清明

{"title":"Real Time Inversion and Field Test of LWD Azimuthal Electromagnetic Waves Based on Quasi-Newton Method","authors":"杨震, 于其蛟, 马清明","doi":"10.11911/SYZTJS.2020025","DOIUrl":"https://doi.org/10.11911/SYZTJS.2020025","url":null,"abstract":"In order to determine the formation interface azimuth and distance by using the data measured by LWD azimuthal electromagnetic wave resistivity logging instrument using the quasi-Newton inversion algorithm.The objective was provide a decision-making basis for geosteering,an accurate and reliable inversion method must be used.For the LWD azimuthal electromagnetic wave resistivity logging instrument,an application model of geological guidance has been established and simulated its response characteristics.By studying the quasi-Newton inversion algorithm and process,the Jacobian matrix was obtained with less calculation cost in the inversion process,which greatly speeds up the inversion.At the same time,the correctness and accuracy of this algorithm were verified by using the theoretical inversion model including both single interface and a double interface strata model.The field test of Well Cao-XX in Shengli Oilfield showed that the real-time inversion results were consistent with the imaging display of azimuthal electromagnetic wave resistivity and also with the drilling/completion/logging results in later stages.This inversion method can meet the requirements of real time geo-steering by efficient and accurate calculation of azimuthal electromagnetic wave resistivity.","PeriodicalId":66447,"journal":{"name":"石油钻探技术","volume":"257 1","pages":"120-126"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76629549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research and Application of Plunger Gas Lift Technology in the Fuling Shale Gas Field 涪陵页岩气田柱塞气举技术研究与应用

石油钻探技术 Pub Date : 2020-01-01 DOI: 10.11911/SYZTJS.2020022

刘华敏, 李牧, 刘乔平, 张丽媛

{"title":"Research and Application of Plunger Gas Lift Technology in the Fuling Shale Gas Field","authors":"刘华敏, 李牧, 刘乔平, 张丽媛","doi":"10.11911/SYZTJS.2020022","DOIUrl":"https://doi.org/10.11911/SYZTJS.2020022","url":null,"abstract":"Plunger gas lift technology is often used for drainage of water and gas recovery in gas wells.However,the conventional short plunger cannot solve some problems in shale gas well in Fuling Shale Gas Field,such as the large master valve on wellhead and downhole variable-diameter pipe string,therefore,an elastic block variablediameter combined plunger was developed.The plunger adopts the design of elastic block and lengthening,which not only ensures the passage of the plunger,but also effectively reduced the leakage rate of the plunger.The temperature and pressure instruments are installed in the plunger to monitor the downhole pressure and the running state of the plunger,so as to provide the basis for adjusting the operating system of the plunger.According to the production characteristics of shale gas wells at different stages,the intervention time and operation system of plunger gas lift are optimized.Plunger lift technology has been applied in 34 wells in Fuling Shale Gas Field,with average daily gas production of a single well increased by 0.95×10^4 m^3,realizing shale gas production continuously and stably.The plunger gas lift technology provides a new technical way for the efficient development of Fuling Shale Gas Field,and has a function of guiding the development in other shale gas fields.","PeriodicalId":66447,"journal":{"name":"石油钻探技术","volume":"33 1","pages":"102-107"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74633345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Standard Division of Tight Oil Reservoirs in Chang 6-8 Members of Changqing Oilfield based on CQ Index 基于CQ指数的长庆油田长6-8段致密油储层标准划分

石油钻探技术 Pub Date : 2020-01-01 DOI: 10.11911/SYZTJS.2020064

夏宏泉, 梁景瑞, 文晓峰

{"title":"The Standard Division of Tight Oil Reservoirs in Chang 6-8 Members of Changqing Oilfield based on CQ Index","authors":"夏宏泉, 梁景瑞, 文晓峰","doi":"10.11911/SYZTJS.2020064","DOIUrl":"https://doi.org/10.11911/SYZTJS.2020064","url":null,"abstract":"The tight oil reservoirs in the Chang 6-8 Member of the Triassic Yanchang Formation in the Ordos Basin are characterized by low porosity,low permeability,low pressure and low production.In order to optimize the geological engineering sweet spots on the single-well section,a practical method for standard division of tight oil reservoirs has been proposed in accordance with the geological characteristics of Chang 6-8 tight oil reservoir.The first step involved calculating and extracting the minimum horizontal principal stress,fracture pressure,brittleness index,porosity,permeability and water saturation of reservoir etc.This allows them to establish the comprehensive evaluation index of the reservoir completion quality(CQ),and then,to classify the reservoirs“good,medium and bad”based on the relationship chart of CQ and single well productivity.And then to optimize the perforating and fracturing intervals in terms of the CQ value.Using this method,reservoir division was performed in Well L375 of the Changqing Longdong Area,and the comparison of division result and the oil test result showed that the perforating/fracturing interval optimized by the CQ index was completely consistent with the actual intervals of high,medium and low production-yields.Study results also indicated that this method could meet the requirements for optimizing the perforating/fracturing intervals of tight oil and and for identifying engineering geological sweet spots,and can be used for a classification standard for block reservoirs.","PeriodicalId":66447,"journal":{"name":"石油钻探技术","volume":"11 1","pages":"114-119"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78042996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0