CAJ | 학술논문

从有利于混积岩储层评价出发，将小梁山狮子沟组（N32）混积岩简化归类为泥质混积岩、砂质混积岩和碳酸盐混积岩，在此基础上根据铸体薄片、物性、孔隙结构等岩心分析数据和测井资料，对柴达木盆地西北部小梁山地区中浅层N32混积岩进行综合研究：N32混积岩岩石结构复杂、类型多样，储层储集空间以原生的粒间孔和微孔隙为主，呈中高孔低渗的特征，排驱压力、中值压力较高，孔喉半径较小，孔隙结构较差；储层质量受沉积相和成岩作用的综合影响，砂坪微相是最主要的有利储集相带，压实作用是储层物性的主要影响因素；根据物性和压汞等参数将N32储层评价为3类，其中Ⅰ、Ⅱ类储层在目前的技术条件下是研究区增储上产的首选储层。
종유리우혼적암저층평개출발，장소량산사자구조（N32）혼적암간화귀류위니질혼적암、사질혼적암화탄산염혼적암，재차기출상근거주체박편、물성、공극결구등암심분석수거화측정자료，대시체목분지서북부소량산지구중천층N32혼적암진행종합연구：N32혼적암암석결구복잡、류형다양，저층저집공간이원생적립간공화미공극위주，정중고공저삼적특정，배구압력、중치압력교고，공후반경교소，공극결구교차；저층질량수침적상화성암작용적종합영향，사평미상시최주요적유리저집상대，압실작용시저층물성적주요영향인소；근거물성화압홍등삼수장N32저층평개위3류，기중Ⅰ、Ⅱ류저층재목전적기술조건하시연구구증저상산적수선저층。
The mixing deposit of N32 in Xiaoliangshan region is simply classed as argillaceous mixing deposit, arenaceous mixing deposit and carbonate mixing deposit for reservoir evaluation.On this basis,combining the data of core analysis,the casting thin sections,porosity and permeability analysis,mercury injection test and log,this paper investigates the mixing deposit reservoir of Shizigou Formation in Xiaoliangshan,northwest of Qaidam Basin:The mixing deposit has complex rock structure and various rock type.The pore space of reser-voir mainly includes the primary intergranular pores and micropores.The reservoir properties are mainly medi-um-high porosity and low permeability,high displacement and saturation median point pressure,small pore throat radius.The pore structure are generally poor.The sedimentation and diagenesis have played important roles in evolution of resevoir.The sand flat microfacies is the main favorable reservoir facies.Compaction is the major factor that has influence on the reservoir physical property.N32 are divided into three types according to parameters like physical property,capillary pressure and so on,reservoirs of the typeⅠand type Ⅱ can be taken as the major target zones for increasing reserves.