准噶尔盆地阜北地区头屯河组砂岩自生绿泥石特征

发布时间：2018-05-01 13:36

本文选题：自生绿泥石 + 头屯河组　；参考：《成都理工大学学报(自然科学版)》2016年04期

【摘要】：自生绿泥石是砂岩储层中常见的成岩矿物。为了完善碎屑岩储层黏土矿物研究成果,并对准噶尔盆地阜北地区侏罗系头屯河组油气勘探提供地质依据,通过岩心采样观察、铸体薄片、扫描电镜、X射线衍射、核磁共振等测试分析手段,对阜北地区头屯河组砂岩储层中自生绿泥石胶结物的产状及其对储层物性的影响进行了研究。结果表明:头屯河组砂岩储层常见自生绿泥石胶结,形成于早成岩阶段早期,主要以孔隙衬里式胶结产出。头屯河组自生绿泥石包膜对于提高岩石的机械强度和抗压实能力有限,只有当自生绿泥石环边呈连续分布且有一定厚度时,才能抑制石英的次生加大;在保留更多原生孔隙的同时,也堵塞孔喉,导致储层渗透率降低。头屯河组自生绿泥石薄膜厚度临界值为8μm,当厚度8μm时,随着自生绿泥石薄膜厚度增大,对压实作用的减缓能力越强,储层物性越好;一旦厚度8μm,自生绿泥石薄膜厚度与储层物性呈明显负相关,不利于储层发育。
[Abstract]:The authigenic chlorite is a common diagenetic mineral in sandstone reservoirs. In order to improve the research results of clay minerals in the clastic reservoir and provide geological basis for oil and gas exploration in the Jurassic Toutun River formation in Fubei area, the test and analysis methods such as core sampling, casting thin film, scanning electron microscope, X ray diffraction, nuclear magnetic resonance and so on are used. The formation of the authigenic chlorite cementation in the sandstone reservoir of the Toutun River formation in the north area and its influence on the physical properties of the reservoir show that the sandstone reservoirs in the Toutun River formation are usually cemented by the authigenic chlorite and formed in the early stage of the early diagenetic stage, mainly with the pore lining type cementation. The Toutun River formation of the authigenic chlorite coating is used to improve the rocks. The mechanical strength and the resistance to compaction are limited. Only when the edges of the autogenic chlorite are continuously distributed and have a certain thickness, the secondary enlargement of the quartz can be suppressed. While retaining more primary pores, the pore throat is blocked and the permeability of the reservoir is reduced. The critical value of the film thickness of the authigenic green debris in Toutun River group is 8 mu, with the thickness of 8 mu, with the thickness of 8 mu. With the increase of the thickness of the autogenic chlorite film, the stronger the ability to slow down the compaction, the better the reservoir physical property. Once the thickness of 8 mu m, the thickness of the autogenic chlorite film is negatively related to the physical property of the reservoir, which is not conducive to the development of the reservoir.

【作者单位】：油气藏地质及开发工程国家重点实验室(成都理工大学);克拉玛依红山油田有限责任公司;中国石油新疆油田公司实验检测研究院;中国石油大学(北京)克拉玛依校区;
【基金】：中国石油新疆油田分公司项目(2014-C4032)
【分类号】：P618.13

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