CAJ | 학술논문

根据野外剖面、钻井岩芯和测井等资料,系统地对塔巴庙地区下石盒子组盒3段储集砂体的岩石学特征、孔隙类型、成岩作用以及物性进行了详细的分析。研究表明,储集层的成分和结构成熟度低；主要孔隙类型有粒间孔、粒内溶孔、晶间溶孔、铸模孔和粒缘缝；孔隙度为0.7%~18.69%,平均值为7.82%；渗透率为0．008×10-3μm2~23.01×10-3μm2,平均值为1.111×10-3μm2,属于物性中-偏低的微孔-溶孔型组合型储集岩。影响储集层的主控因素包括：(1)河道控制了优质储层的分布范围和规模；(2)成岩期早期环边绿泥石胶结、溶蚀等建设性成岩作用是形成储层的基础；(3)成岩相扩大了储层的分布范围,改善了储层的物性。在上述研究的基础上,结合储集砂体的沉积微相特征、物性平面展布特征、储集砂体成岩相特征,在研究区内圈定了Ⅱ、Ⅲ两类有利勘探区块,为研究区下一步的勘探、开发提供了科学依据。
근거야외부면、찬정암심화측정등자료,계통지대탑파묘지구하석합자조합3단저집사체적암석학특정、공극류형、성암작용이급물성진행료상세적분석。연구표명,저집층적성분화결구성숙도저；주요공극류형유립간공、립내용공、정간용공、주모공화립연봉；공극도위0.7%~18.69%,평균치위7.82%；삼투솔위0．008×10-3μm2~23.01×10-3μm2,평균치위1.111×10-3μm2,속우물성중-편저적미공-용공형조합형저집암。영향저집층적주공인소포괄：(1)하도공제료우질저층적분포범위화규모；(2)성암기조기배변록니석효결、용식등건설성성암작용시형성저층적기출；(3)성암상확대료저층적분포범위,개선료저층적물성。재상술연구적기출상,결합저집사체적침적미상특정、물성평면전포특정、저집사체성암상특정,재연구구내권정료Ⅱ、Ⅲ량류유리감탐구괴,위연구구하일보적감탐、개발제공료과학의거。
The present paper gives a detailed description of lithology, porosity types and diagenesis on the basis of cores, thin sections and well logs of the reservoir sandstones from the third member of the Lower Shihezi Formation in the Tabamiao region, northern Ordos Basin. These reservoir sandstones have lower compositional and textural maturity. The porosity types include intergranular pores, intragranular solution openings, intercrystal solution openings, moldic pores and grain-margin fissures. The porosity between 0. 7% and 18. 69% with an average of 7. 82% and the permeability from 0. 008 × 10-3μm2 to 23. 01 × 10-3μm2 with an average of 1. 111 × 10-3μm2 indicate the micropores-type and solution openings-type reservoir rocks. The channels may exercise a major control on the distribution and range of the excellent reservoir rocks. The constructive diagenetic processes such as rimmed chlorite cementation and dissolution during the early diagenesis are considered as the basic conditions for the generation of reservoir rocks. The diagenetic facies play an indispensable role in the further expansion of the reservoir area and improvement of the reservoir quality of reservoir rocks. The favourable blocks are delineated in terms of sedimentary microfacies of the reservoir sandstones, planar distribution of the physical properties and diagenetic facies of the reservoir sandstones. The results of research in this study may provide a geological basis for the further exploration in the study area.