利用泥岩压实曲线特征预测靖边气田高产区带
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摘要
文章论述了粘土矿物沉积后变化特征以及典型的泥岩压实原理及其孔隙度变化趋势,利用声波测井曲线与岩石孔隙度的关系,对靖边气田二叠系—石炭系泥岩的压实特征进行了研究。多井泥岩压实曲线的分析发现,靖边气田下古生界气藏石炭系泥岩盖层普遍存在“欠压实”现象,且其“欠压实”程度与单井无阻流量呈正相关关系,并得到新完钻试气井证实。此外,还对这种现象的形成缘由作了初步探讨,可以利用已钻井石炭系泥岩盖层声波时差异常值进行平面成图,结合地震横向预测储层的展布成果,预测出高产区带和未钻井部位无阻流量,为优选开发井位提供了依据,达到了高效开发下古生界气藏的目的。
By taking the Permian—Carboniferous mudstones as a research target, on the basis of expounding the change characteristics of the clay minerals after their being deposited and in light of mudstone compaction principle and porosity variation trend, it was found out that there exists commonly the “undercompaction” phenomenon in the Carboniferous mudstone caprocks of the Lower Paleozoic reservoirs through summarizing the mudstone compaction curves of many wells in consideration of the relation between the interval transit time of acoustic logging and the rock porosity; and the “undercompaction” level is positively correlated to the open-flow capacity of single well, which has been proved by the newly-drilled gas well testing data. In addition, in the paper, the reason for forming such a phenomenon is discussed and the high productivity zones and the open-flow capacities of undrilled wells are predicted by drawing up the horizontal plan of the abnormal values of the interval transit time of acoustic logging and in combination with the results of seismic lateral reservoir prediction, thus providing a basis for optimizing development well sites and attaining the aim of developing the Lower Palaeozoic gas reservoirs high effectively. (Financed by the project of the Key Technologies Research and Development Program of the Ninth Five-Year Plan: “Research on the enrichment law of Lower Palaeozoic gas reservoirs in Changqing Field and their high productivity well selection”)
By taking the Permian—Carboniferous mudstones as a research target, on the basis of expounding the change characteristics of the clay minerals after their being deposited and in light of mudstone compaction principle and porosity variation trend, it was found out that there exists commonly the “undercompaction” phenomenon in the Carboniferous mudstone caprocks of the Lower Paleozoic reservoirs through summarizing the mudstone compaction curves of many wells in consideration of the relation between the interval transit time of acoustic logging and the rock porosity; and the “undercompaction” level is positively correlated to the open-flow capacity of single well, which has been proved by the newly-drilled gas well testing data. In addition, in the paper, the reason for forming such a phenomenon is discussed and the high productivity zones and the open-flow capacities of undrilled wells are predicted by drawing up the horizontal plan of the abnormal values of the interval transit time of acoustic logging and in combination with the results of seismic lateral reservoir prediction, thus providing a basis for optimizing development well sites and attaining the aim of developing the Lower Palaeozoic gas reservoirs high effectively. (Financed by the project of the Key Technologies Research and Development Program of the Ninth Five-Year Plan: “Research on the enrichment law of Lower Palaeozoic gas reservoirs in Changqing Field and their high productivity well selection”)
引文
1 冯增昭编著.沉积岩石学.北京:石油工业出版社,1989
2 真柄钦次.压实与流体运移.北京:地质出版社,1970
3 徐怀大译著.泥质沉积物的压实.北京:地质出版社,1975
4 邸世祥.油田水文地质学.陕西西安:西北大学出版社,1991
5 王勇,王宏等.靖边气田优化布井技术及其在产能建设中的应用.天然气工业,2002;22(6):80~83
6 杨华,张明禄等.低渗透油气田研究与实践(卷6).北京:石油工业出版社,2003
2 真柄钦次.压实与流体运移.北京:地质出版社,1970
3 徐怀大译著.泥质沉积物的压实.北京:地质出版社,1975
4 邸世祥.油田水文地质学.陕西西安:西北大学出版社,1991
5 王勇,王宏等.靖边气田优化布井技术及其在产能建设中的应用.天然气工业,2002;22(6):80~83
6 杨华,张明禄等.低渗透油气田研究与实践(卷6).北京:石油工业出版社,2003
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