歧口凹陷歧北斜坡沙三段成岩作用及其对储层影响分析  

Diagenesis and reservoir characteristics analysis at Es_3 in Qibei Ramp of Qikou Sag

作　　者：张晶[1] 李勇[1] 张自力[1] 张威[1] 王伟[1] 钱赓[1] 蒲秀刚[2] 刘刚[3] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059 [2]中国石油大港油田公司勘探开发研究院,天津300280 [3]中国石油大港油田公司采油二厂,天津300280

出　　处：《地质学刊》2012年第1期8-16,共9页Journal of Geology

基　　金：中石油大港油田分公司科技项目"歧口凹陷沙三段成岩演化动力机制与储层时空分布研究";国家自然科学基金项目(40972083;49803013;40372084;40841010);中国地质调查局应急项目;中石化前瞻性项目资助

摘　　要：根据常规薄片、铸体薄片、扫描电镜、X衍射、阴极发光等资料分析,对歧口凹陷歧北斜坡沙三段岩石学特征、成岩作用类型、成岩阶段划分及其对孔隙的影响进行了研究。结果表明,研究区沙三段储层岩石类型为长石岩屑砂岩、岩屑长石砂岩。现今主要处于早成岩B期、中成岩期,部分埋深较大的地区进入晚成岩期。经历的成岩作用有压实作用、胶结作用、交代作用、溶蚀作用、破裂作用。其中,压实作用、胶结作用是主要的破坏性成岩作用,溶蚀作用是主要的建设性成岩作用,特别对长石、岩屑和碳酸盐胶结物的溶蚀是储层物性变好的重要的成岩控制因素。The authors carried out the studies on the lithological characteristics, the types of diagenesis, the division of digenetic stages and the influence on pore based on the analysis results on the routine thin sections, the cast thin sections, SEM, X-ray, cathode. luminescence at Es3 in Qibei Ramp of Qikou Sag. The study showed the types of diagenesis included both feldspathic litharenite and lithic arkose in the reservoirs at Es3. The reservoirs at present were developed in the early-diagenesis B stage to the middle-diagenesis stage but a part of those was under the late-diagenesis stage. Compaction, cementation, metasomatism, denudation, cataelasis were all found in these reservoirs. And compaction and cementation were the major destructive constructional diagenesis, while metasnmatism contributed to the favorable reservoir quality, especially for the cementing material of feldspar, debris, and carbonate metasomatism played an important constructive role to the favorable reservoir quality.

关 键 词：歧北斜坡 沙三段 成岩作用 压实作用 胶结作用 渤海湾盆地 

分 类 号：P618.130.21[天文地球—矿床学]