一种储层描述新方法在渤海JX油田开发中的应用
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摘要
沙河街组为JX油田主要含油层位之一,由于埋深大、海上地震采集干扰多等因素,难以通过地震手段精细刻画及描述储层,给油田早期开发带来诸多困难。充分利用地震、测井等资料,判别古地貌为沉积主控因素,利用古地貌反映地层厚度变化,结合砂地比绘制砂岩厚度图,建立储层定量描述方法,同时,利用测井相及地震相,判别砂体边界及叠加样式,可较好解决开发井实施的问题。从开发井实施效果看,开发井实钻油层厚度达到设计的1.5～6.0倍,储量较钻前增加300×104 t;平均单井日产100 t,为钻前设计产能的1.5倍;油田采收率达到30.1%,较钻前提高7.8%。
Shahejie formation is one of the main oil-bearing formations of JX oilfield,due to the factors such as deep buried depth,much interference in marine seismic acquisition and etc,it is difficult to carry out accurate reservoir description by means of seismic technology and brings much difficulty for early oilfield development.By making full use of seismic data and logging data,the paleogeomorphology is found to be the main control factor of sedimentary.According to paleogeomorphic features,the reservoir thickness variance has been reflected.Combined with sandstone thickness map,quantitative reservoir description method has been established.At the same time,the sand body boundary and superimposed style have been distinguised by using logging facies and seismic facies so as to resolve the problem of drilling development well.From the implementation effect of development well,the real drill reservoir thickness is 1.5~6.0 times than previous design.The reserve volume increases 300×104t than previous design.The average daily production per well is 100 t/d,which is 1.5 times than previous design.And the oilfield recovery ratio reaches 30.1%,improving 7.8% than before.
Shahejie formation is one of the main oil-bearing formations of JX oilfield,due to the factors such as deep buried depth,much interference in marine seismic acquisition and etc,it is difficult to carry out accurate reservoir description by means of seismic technology and brings much difficulty for early oilfield development.By making full use of seismic data and logging data,the paleogeomorphology is found to be the main control factor of sedimentary.According to paleogeomorphic features,the reservoir thickness variance has been reflected.Combined with sandstone thickness map,quantitative reservoir description method has been established.At the same time,the sand body boundary and superimposed style have been distinguised by using logging facies and seismic facies so as to resolve the problem of drilling development well.From the implementation effect of development well,the real drill reservoir thickness is 1.5~6.0 times than previous design.The reserve volume increases 300×104t than previous design.The average daily production per well is 100 t/d,which is 1.5 times than previous design.And the oilfield recovery ratio reaches 30.1%,improving 7.8% than before.
引文
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[4]李建平,周心怀,吕丁友.渤海海域古近系三角洲沉积体系分布与演化规律[J].中国海上油气,2011,23(5):293-298.
[5]曹树春,刘春成.古近系储层开发地震研究思路和实践[J].天然气工业,2007,(S1):34-38.
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[7]窦欣,赵立旻,常津焕.辽河西部凹陷马南地区沙三段岩性油气藏储层识别技术[J].石油地质与工程,2012,26(1):4-7.
[8]邵伟民,李小刚,花彩霞,等.车排子地区地震砂体识别在岩性油气藏勘探中的应用[J].石油地质与工程,2011,25(6):4-7.
[9]赵海峰,张效楠,明君,等.渤海Z油田开发阶段储层预测研究[J].石油地质与工程,2011,25(6):60-62.
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[11]何军,吴雪莎.地震相分析法在建南地区飞三段鲕滩储层预测中的运用[J].石油地质与工程,2009,23(6):39-44.
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