镇泾探区长9成岩作用及对储层物性的影响  

Diagenesis and its influence on the reservoir quality of Chang 9 oil layer in Zhenjing area

作　　者：郭军[1,2] 陈洪德[2,3] 赵俊兴[2,3] 向芳[2,3] 李婕[2] 孔祥超[2] 

机构地区：[1]湖南省煤炭地质勘查院,湖南长沙410014 [2]成都理工大学沉积地质研究院,四川成都610059 [3]成都理工大学油气藏地质及开发工程国家重点实验室

出　　处：《复杂油气藏》2014年第2期21-24,29,共5页Complex Hydrocarbon Reservoirs

摘　　要：利用岩心描述、铸体薄片、扫描电镜和岩矿分析等手段,对鄂尔多斯盆地镇泾探区长9储层砂岩的成岩作用及其对储层物性发育的影响进行了分析研究。结果表明:研究区储层砂岩经历了压实、胶结、溶蚀、交代和重结晶五种成岩作用类型,其中压实作用使得塑性岩屑发生弯曲变形、刚性岩屑碎裂,导致原生孔隙大幅度减少;方解石胶结物在某些井位和层段中含量可达25%,并形成连生胶结,造成砂岩的孔隙度损失严重;溶蚀作用形成的次生粒内溶孔(包括少量粒间溶孔)增加了研究区储层砂岩平均值为2.87%的面孔率。长9储层砂岩处于晚成岩阶段A期的晚期至B期的早期。With the use of core description, casting thin sections, scanning electrom microscopy and rock ore analysis etc. , the diagenesis and its influence on the reservoir quality of Chang 9 reservoir sandstone in Zhenjing exploratory area, Ordos Basin,was analyzed and researched. The results showed that the sandstone reservoir in the study area experienced five types of diageneses： compaction, cementation, dissolution, metasomatism, and recrystallization. The compaction made the plastic debris bending deformation and rigid rock splintering, leading to the great reduction of primary pores. In some locations and intervals, calcite cement content can reach 25% and form cementation, making serious loss of sandstone po- rosity. The secondary solution pores, generated by dissolution,including a small amount of intergranular dissolved pores, in- creased the face rate of rock by 2.87%. Chang 9 reservoir sandstone was at the late A stage to the early B stage of the late diagenetic period.

关 键 词：长9 储层 储层物性 成岩作用 镇泾探区 鄂尔多斯盆地 

分 类 号：TE122.12[石油与天然气工程—油气勘探]