B153井区超低渗透储层孔隙定量演化模式  

POROSITY QUANTITATIVE EVOLUTION MODEL OF THE ULTRA-LOW-PERMEABILITY RESERVOIRS IN BLOCK B153

作　　者：刘丽[1] 赵应成[1] 王友净[1] 李佳鸿[1] 惠钢[1] 闫林辉[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《大庆石油地质与开发》2016年第3期36-42,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油重大科技专项子课题中国石油勘探与生产公司专项"特低渗透油藏水驱提高采收率关键技术"(2011B-1205)

摘　　要：综合利用岩石薄片、扫描电镜、黏土矿物X衍射以及岩石物性等资料,对鄂尔多斯盆地华庆油田B153井区长6_3储层的基本特征、成岩作用和孔隙演化等方面进行了研究,结合埋藏史和地热史,建立了储层孔隙度定量演化模式。研究表明:长6_3储层处于中成岩A阶段,在埋藏过程中先后经历了压实、胶结、溶蚀作用的改造,压实、胶结作用对储层物性具有明显的破坏作用,溶蚀作用虽改善储层物性,但效果不明显;持续的压实作用使储层孔隙度减小17.2%,早期绿泥石胶结作用减小孔隙度4.9%,晚期黏土矿物和含铁碳酸盐胶结减少孔隙度5.8%,烃源岩成熟形成大量的有机酸溶蚀砂体形成次生孔隙,使储层孔隙度增大3.0%。Through the comprehensive integration of thin sections,scanning electron microscopy,clay mineral's X diffraction,rock physical properties and the other data,taking Reservoir Chang 6_3 in Block B153 of Huaqing Oilfield as example,the basic characteristics,diagenesis,porosity evolution and so on are studied.And furthermore,in combination of the burial and thermal histories,the quantitative porosity evolution models are established.The achievements show that Reservoir Chang 6_3 has reached Stage A of the middle diagenetic phase,and experienced the compaction,cementation,dissolution reconstruction during the burial.The former two has player obvious damage role in the reservoir physical properties,while the latter has improved a certain degree,but the effects are not remarkable;the continuous compaction makes the porosity reduced to 17.2%,the early chlorite cementation led to the porosity loss by 4.9%,the later cementation of the clay minerals and ferro-carbonate cements make the porosity reduced by 5.8%,the secondary sandbody pores are dissolved by a large amount of organic acid resulted from the source rock maturity,and moreover the reservoir porosity increases by 3.0%.

关 键 词：成岩作用 孔隙度演化模式 长63 超低渗储层 

分 类 号：P618.13[天文地球—矿床学]