南堡凹陷柳赞油田沙三~(2+3)油藏滚动勘探开发新认识
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摘要
南堡富油凹陷的柳赞Es32+3复杂油藏,滚动勘探开发20多年,该油藏初期评价开发产量多年徘徊不前。分析认为低效开发的主因是构造极破碎、油水关系太复杂。"十五"期间,应用二次三维地震新技术成果、层序地层学地质新理论暨地层研究新技术方法,使油藏地质认识产生大变化:一是认识到含油层系近距离厚度剧变,是盆缘断层根部沉积陡坡沉积缺失的悬殊差异——局部不整合所造成;二是首次低品质三维地震资料解释的大批断点不存在。由此认清了柳赞沙三2+3油藏构造为完整断鼻及较整装背斜的真面貌,认清其油水层电性特征、分布规律,发现很多漏失油气层。地质新认识促使储量、产量发生大变化。柳赞沙三2+3油藏"十五"新增探明储量2200多万吨,油藏精细描述、细分层系科学注水开发,年产油增加到2.7倍,老油田重发勃勃生机,成为油区增储上产的主力油藏。
Es32+3 complex reservoir in Liuzan Oilfield of Nanpu Sag has been under rolling exploration and development for more than 20 years. However,the output of development of the reservoir has not increased for many years according to preliminary evaluation.Analysis shows that the main causes of low-efficiency development are the fractured structures and the complicated relationship between oil and water.New second-time 3d seismic exploration techniques and new geological theories of sequence stratigraphy,i.e.,new technical methods of strata research were applied during the Tenth Five-Year Plan period,which led to some new understandings on reservoir geology.Firstly,dramatic change of thickness near oil layers was caused by the local unconformity of basin-margin fault.Secondly,there were no so many breakpoints as mentioned in interpretation of the first-time poor-quality 3d seismic data.It was shown that Es32+3 reservoir was a complete fault nose and bulk anticline.Electrical characteristics and distribution law of oil-water layers of the reservoir were recognized as well.A lot of leakage oil-water layers were newly discovered.New geological understandings lead to remarkable change of reserves and output.During the Tenth Five-Year Plan period,more than 22 million tons of reserves were discovered in Es32+3 reservoir.The reservoir was finely described and waterflooding development was conducted on mini-layer series with scientific approaches.Annual oil output of the reservoir increased by 2.7 times than before.Some old oilfields turned into main reservoirs for increasing oil reserves and output in the area.
Es32+3 complex reservoir in Liuzan Oilfield of Nanpu Sag has been under rolling exploration and development for more than 20 years. However,the output of development of the reservoir has not increased for many years according to preliminary evaluation.Analysis shows that the main causes of low-efficiency development are the fractured structures and the complicated relationship between oil and water.New second-time 3d seismic exploration techniques and new geological theories of sequence stratigraphy,i.e.,new technical methods of strata research were applied during the Tenth Five-Year Plan period,which led to some new understandings on reservoir geology.Firstly,dramatic change of thickness near oil layers was caused by the local unconformity of basin-margin fault.Secondly,there were no so many breakpoints as mentioned in interpretation of the first-time poor-quality 3d seismic data.It was shown that Es32+3 reservoir was a complete fault nose and bulk anticline.Electrical characteristics and distribution law of oil-water layers of the reservoir were recognized as well.A lot of leakage oil-water layers were newly discovered.New geological understandings lead to remarkable change of reserves and output.During the Tenth Five-Year Plan period,more than 22 million tons of reserves were discovered in Es32+3 reservoir.The reservoir was finely described and waterflooding development was conducted on mini-layer series with scientific approaches.Annual oil output of the reservoir increased by 2.7 times than before.Some old oilfields turned into main reservoirs for increasing oil reserves and output in the area.
引文
[1]周海民,常学军,廖保方,等.复杂断块油田精细开发——渤海湾盆地南堡凹陷精细开发实践与认识[M].北京:石油工业出版社,2004
[2]周海民,廖保方.冀东油田复杂断块油藏精细描述与实例[J].中国石油勘探,2005,10(5):5～12
[3]王平,李纪辅,李幼琼,等.复杂断块油田详探与开发[M].北京:石油工业出版社,1994
[4]蔡希源,李思田,等.陆相盆地高精度层序地层学——隐蔽油气藏勘探基础、方法与实践[M].北京:地质出版社,2003
[5]刘震,吴因业.层序地层框架与油气勘探[M].北京:石油工业出版社,1999
[6]李国欣,欧阳健,周灿灿,等.中国石油低阻油层岩石物理研究与测井识别评价技术进展[J].中国石油勘探,2006,11(2):43～50
[7]罗群,周海民,董月霞,等.陆相断陷盆地隐蔽油气藏成因类型及控制因素[J].中国石油勘探,2007,12(2):7～14
[8]周海民,常学军,等.冀东复杂断块油田滚动勘探开发配套技术研究与应用[J].北京:石油工业出版社,2004
[2]周海民,廖保方.冀东油田复杂断块油藏精细描述与实例[J].中国石油勘探,2005,10(5):5～12
[3]王平,李纪辅,李幼琼,等.复杂断块油田详探与开发[M].北京:石油工业出版社,1994
[4]蔡希源,李思田,等.陆相盆地高精度层序地层学——隐蔽油气藏勘探基础、方法与实践[M].北京:地质出版社,2003
[5]刘震,吴因业.层序地层框架与油气勘探[M].北京:石油工业出版社,1999
[6]李国欣,欧阳健,周灿灿,等.中国石油低阻油层岩石物理研究与测井识别评价技术进展[J].中国石油勘探,2006,11(2):43～50
[7]罗群,周海民,董月霞,等.陆相断陷盆地隐蔽油气藏成因类型及控制因素[J].中国石油勘探,2007,12(2):7～14
[8]周海民,常学军,等.冀东复杂断块油田滚动勘探开发配套技术研究与应用[J].北京:石油工业出版社,2004
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