孤东油田七区西厚油层剩余油分布及水平井开发技术研究
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摘要
中文摘要孤东油田馆上段正粒序厚油层的开发已进入高含水期,但采出程度较低。为提高厚油层采收率,本文以孤东油田七区西馆上段水道砂岩厚油层为研究对象,对厚油层进行分段对比,并对其中夹层的井点识别和井间预测进行了研究。在此基础上开展厚油层开采特征与剩余油分布特征研究,寻找剩余油富集区,确定潜力目标。最后通过开展正粒序厚油层水平井开发技术政策界限研究,形成了正粒序厚油层水平井开发配套技术。论文的主要成果及认识如下:
(1)应用沉积学理论,对水道砂岩储层进行了细分对比研究,并通过取心井建立岩电关系,用高分辨率测井识别井点夹层,用韵律层对比、物性截断、条件模拟等方法预测井间夹层,描述层内夹层的空间展布。
(2)综合运用地质分析、开发动态分析、油藏工程、数值模拟等方法,对剩余油分布进行了研究,实现了对剩余油富集区的定量描述。
(3)系统地研究了夹层分布特征、油层水淹程度、水平井段长度、生产压差以及提液时机等参数对水平井开发效果的影响,确定了正粒序厚油层水平井开发技术政策界限。
(4)在高含水开发后期、密井网条件下,根据上述剩余油定量描述成果,运用水平井技术挖潜厚油层剩余油,新设计水平井12口,增加了可采储量35×104t,提高了采收率2.1%。
The thick oil-bearing channel sandstone reservoir of the Upper Guantao Formation has already developed into its high water cut stage, but the recovery factor remains in a low level. Therefore, the Upper Guantao Formation of the western Block 7 of Gudong Oilfield was selected as the research target in this paper. To enhance the thick oil-bearing channel recovery, in the research work, sedimentary features and architecture elements, as well as the electric properties of intercalated bed became the recognition criteria. On the basis of detailed geologic research on the thick oil-bearing finning upward sequence segment, the thick channel oil sand body research of filtration mechanism, development characters and regular and the remaining oil pattern was done to find the rich domain and to locate the potential targets. Finally, by developing policy limitation research of horizontal well development technique for finning upward sequence channel reservoir, horizontal well development techniques were formed. In this thesis, the main results are as follows:
(1) By using sedimentology theory, the correlation and subdivision research were done to the channel sand reservoir, and relationship between core and electric responses was founded from the cored well. High-resolution well log and fine interpretation technique are used to identify single well intercalated bed. Interwell intercalated bed was forecasted by rhythmic layer correlation, physical property cutoff and conditional simulation, and three-dimensional distribution of intraformational intercalated bed was described.
(2) The technique set of combination geologic analysis, reservoir performance analysis, reservoir engineering, numerical simulation were formed to described remaining oil enriched area in qualitative and quantitative way.
(3)Distribution characteristics of intercalated bed, degree of water sweep, length of horizontal section , producing pressure drop and liquid increase timing were studied systematically to the development effect of horizontal well. Technical support limitation of horizontal well of channel sand reservoir was confirmed.
(4)On the condition of late high water cut stage and small-spaced well pattern, we extracted remaining oil successfully by horizontal wells aiming at the distribution character of remaining oil of thick oil layer. 12 horizontal wells were drilled with increment of recoverable reserves of 35×10~4t, i.e. 2.1% of the OOIP.
(1)应用沉积学理论,对水道砂岩储层进行了细分对比研究,并通过取心井建立岩电关系,用高分辨率测井识别井点夹层,用韵律层对比、物性截断、条件模拟等方法预测井间夹层,描述层内夹层的空间展布。
(2)综合运用地质分析、开发动态分析、油藏工程、数值模拟等方法,对剩余油分布进行了研究,实现了对剩余油富集区的定量描述。
(3)系统地研究了夹层分布特征、油层水淹程度、水平井段长度、生产压差以及提液时机等参数对水平井开发效果的影响,确定了正粒序厚油层水平井开发技术政策界限。
(4)在高含水开发后期、密井网条件下,根据上述剩余油定量描述成果,运用水平井技术挖潜厚油层剩余油,新设计水平井12口,增加了可采储量35×104t,提高了采收率2.1%。
The thick oil-bearing channel sandstone reservoir of the Upper Guantao Formation has already developed into its high water cut stage, but the recovery factor remains in a low level. Therefore, the Upper Guantao Formation of the western Block 7 of Gudong Oilfield was selected as the research target in this paper. To enhance the thick oil-bearing channel recovery, in the research work, sedimentary features and architecture elements, as well as the electric properties of intercalated bed became the recognition criteria. On the basis of detailed geologic research on the thick oil-bearing finning upward sequence segment, the thick channel oil sand body research of filtration mechanism, development characters and regular and the remaining oil pattern was done to find the rich domain and to locate the potential targets. Finally, by developing policy limitation research of horizontal well development technique for finning upward sequence channel reservoir, horizontal well development techniques were formed. In this thesis, the main results are as follows:
(1) By using sedimentology theory, the correlation and subdivision research were done to the channel sand reservoir, and relationship between core and electric responses was founded from the cored well. High-resolution well log and fine interpretation technique are used to identify single well intercalated bed. Interwell intercalated bed was forecasted by rhythmic layer correlation, physical property cutoff and conditional simulation, and three-dimensional distribution of intraformational intercalated bed was described.
(2) The technique set of combination geologic analysis, reservoir performance analysis, reservoir engineering, numerical simulation were formed to described remaining oil enriched area in qualitative and quantitative way.
(3)Distribution characteristics of intercalated bed, degree of water sweep, length of horizontal section , producing pressure drop and liquid increase timing were studied systematically to the development effect of horizontal well. Technical support limitation of horizontal well of channel sand reservoir was confirmed.
(4)On the condition of late high water cut stage and small-spaced well pattern, we extracted remaining oil successfully by horizontal wells aiming at the distribution character of remaining oil of thick oil layer. 12 horizontal wells were drilled with increment of recoverable reserves of 35×10~4t, i.e. 2.1% of the OOIP.
引文
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[2]陈元千著,实用油气藏工程方法,石油大学出版社,1998
[3]郎兆新,油藏工程基础,石油大学出版社,1991
[4]万仁溥,中国不同类型油藏水平井开采技术,石油工业出版社,1997
[5]冈秦麟,高含水期油田改善水驱效果新技术,石油工业出版社,1999
[6]段昌旭等,胜坨多层砂岩油藏开发模式研究,石油工业出版社,1998
[7]段昌旭等,常规稠油油藏开发模式研究,石油工业出版社,1998
[8]刘恒罗昌燕,特高含水期提高厚油层开发效果的途径,大庆石油地质与开发.1992,11(3).-35-39
[9]胡书勇,南力亚等.陆相碎屑岩储层隔夹层成因、特征及其识别.测井技术[J].2003,27(3).-221-224
[10]陈程,孙义梅.厚油层内部夹层分布模式及对开发效果的影响.大庆石油地质与开发[J],2003,22(2):24～27
[11]中国不同类型油藏水平井开采技术,万仁溥主编,石油工业出版社,1997.12张吉,张烈辉,南力亚等.陆相碎屑岩储层隔夹层成因、特征及其识别.测井技术[J],2003,27(3):221～224
[12]王洪辉.河南双河油气田Ⅳ1 -3层系夹层分布研究.天然气工业[J],2000.5
[13]王志章,熊琦华,张一伟等.高度非均质复杂断块油田油层有效厚度的确定方法.石油大学学报[J],1995.8
[14]姜建伟,李庆明.夹层对厚油层开发效果的影响.西南石油学院学报[J],1996.2
[15]袁秉衡.应用地震技术研究储层[M].北京:石油工业出版社,1992.9
[16]薛培华.河流点砂坝储层模式研究[M].北京:石油工业出版社,1991
[17]焦养泉,李祯.河道储层砂岩中隔挡层的成因与分布规律.石油勘探与开发[J],1995,22(4):78～80
[18]王寿庆.双河油田储层非均质特征和非均质模式.石油勘探与开发[J],1987,14(1):55～582
[19]陈程,贾爱林,孙义梅.厚油层内部相结构模式及其剩余油分布特征.石油学报[J],2000.9
[20] Du Qinglong , et al. Study on Genetic Type and Potential Tapping Measures of the Remaining Oil in Multi-layered and Heterogeneous Sandstone Reservoir, SPE57319
[21] Sutopo, et al. Accurate and Effective Simulation for Reservoirs of ComplexGeological Features, SPE77903
[22] W.C.Fisher, et al. Targetting the Guinevere Horizontal Well: A Case Study Involving Geostatistics, Reservior Description, Reservoir Simulation, and Drilling Engineering, SPE 28879
[23]陈德坡王延忠柳世成.孤东油田七区西馆陶组上段储层非均质性及剩余油分布,石油与天然气地质,2004,Vol(3)539-543、581
[24]窦之林,曾流芳,张志海.大孔道诊断和描述技术研究.石油勘探与开发[J],2001.2
[25]曾流芳,赵国景,张子海.疏松砂岩油藏大孔道形成机理及判别方法.应用基础与工程科学学报[J],2002.9
[26]刘月田,孙保利,于永生.大孔道模糊识别与定量计算方法.石油钻采工艺[J],2003.10
[27]史有刚,曾庆辉,周晓俊.大孔道试井理论解释模型.石油钻采工艺[J],2003.6
[28]孙建华,柳红春,刘鹏程等.井间示踪监测技术在高含水油田提高采收率技术中的应用.新疆石油学院学报[J],2003.6
[29]王祥,夏竹君,张宏伟等.利用注水剖面测井资料识别大孔道的方法研究.测井技术[J],2002.4
[30]邓玉珍,赵红霞.亲水正韵律油藏水驱厚度的影响因素研究.油气地质与采收率[J],2001.12
[31]姜建伟,李庆明.夹层对厚油层开发效果的影响.西南石油学院学报[J],1996.2
[32]张大为,曾昭英,孙刚.夹层垂向渗透率对低渗透油层含油饱和度的影响.大庆石油学院学报[J],2000.3
[33]水平井开采技术,万仁溥等编译,石油工业出版社,1995.3
[34] 1996年第二届国际SPE/CIM水平井技术会议论文集.上册,许岱文等译,石油工业出版社,1999.02
[35] 1996年第二届国际SPE/CIM水平井技术会议论文集.下册,许岱文等译,石油工业出版社,1999.07
[36]国外水平井技术应用论文集.上册,刘翔鹗,刘尚奇等编译,石油工业出版社,1999.12
[37]水平井钻井完井及增产技术,李介士等编译,石油工业出版社,1992.06
[38]中国不同类型油藏水平井开采技术,万仁溥主编,石油工业出版社,1997.12
[39]中国水平井应用实例分析,王家宏主编,石油工业出版社,2003
[40]宋付权,刘慈群.单一直线边界油藏中水平井渗流压力动态分析[J].石油勘探与开发,1997,24(4):47-50.
[41]周生田,张琪.水平井水平段压降的一个分析模型[J].石油勘探与开发, 1997, 24(3):49-52
[42]李远钦,刘雯林.水平井产量分布反演[J].石油勘探与开发, 1999, 26(3): 66-71.
[43]范子菲.底水驱油藏水平井产能公式研究[J].石油勘探与开发, 1993, 20(1):71-75,81.
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