CAJ | 학술논문

综合运用岩石薄片、铸体薄片、扫描电镜及物性分析等资料,对高桥地区盒8段气层组的岩石学特征、孔隙类型及储层物性进行了深入研究。结果表明,以辫状河三角洲前缘为主的盒8段储层主要为石英砂岩及岩屑石英砂岩,具有成分成熟度高、结构成熟度中等的特点。储集空间以次生溶孔为主,高岭石晶间孔及原生粒间孔次之,见少量微裂缝。孔隙度平均为6.37%,渗透率平均为0.81mD,为典型的低孔、低渗储层。在储层特征研究的基础上,分析了影响储层物性的主要因素,平面上主要受物源、沉积相带的控制,垂向上主要受压实和胶结作用控制,溶蚀作用产生的次生孔隙使储层物性得到改善。
종합운용암석박편、주체박편、소묘전경급물성분석등자료,대고교지구합8단기층조적암석학특정、공극류형급저층물성진행료심입연구。결과표명,이변상하삼각주전연위주적합8단저층주요위석영사암급암설석영사암,구유성분성숙도고、결구성숙도중등적특점。저집공간이차생용공위주,고령석정간공급원생립간공차지,견소량미렬봉。공극도평균위6.37%,삼투솔평균위0.81mD,위전형적저공、저삼저층。재저층특정연구적기출상,분석료영향저층물성적주요인소,평면상주요수물원、침적상대적공제,수향상주요수압실화효결작용공제,용식작용산생적차생공극사저층물성득도개선。
By analyzing thin sections, scanning electronic microscope and physical properties, the petrology characteristics, pore types and reservoir properties of He 8 member in Gaoqiao area were studied. The result shows that the rocks of the reservoir of He 8 member which deposited in braided delta front are mainly composed of quartz sandstone and lithic quartz sandstone with high compositional maturity and medium textural maturity. The reservoir developed secondary dissolved pores primarily, followed by kaolinite inter-crystalline pores and primary intergranular pores, and a little microerack. The average porosity is 6.37% and the average permeability is 0.81 mD, and it belongs to typical low porosity and low permeability reservoir. The main factors influencing the reservoir properties were analyzed. The reservoir properties are controlled by provenance and sedimentary facie zone in plane, and controlled by compaction and cementation in the vertical direction, whereas the secondary pores produced by dissolution improve the reservoir properties.