CAJ | 학술논문

运用岩石薄片、铸体薄片、扫描电镜、阴极发光和物性测试等手段，详细研究了羌塘盆地角木日地区羌资5井中二叠统龙格组、下二叠统展金组碳酸盐岩的岩石学特征及储层物性。岩石类型主要为泥晶灰岩、砂屑灰岩、细晶白云岩及粉晶白云岩，储集空间主要包括晶间孔、次生溶孔、构造缝和溶蚀缝。灰岩孔隙度平均值为0.40％，渗透率平均值为0.016×10-3μm2；白云岩孔隙度平均值为2.73％，渗透率平均值为0.012×10-3μm2，基本上属于低孔低渗致密储集层。综合评价了成岩作用对储层物性的影响，通过对比分析区内龙格组灰岩与展金组白云岩的成岩作用及孔渗参数，认为白云石化作用能够保持甚至提高原有岩石的孔隙度，而去白云石化作用会导致孔隙堵塞，对储层的形成起破坏作用。
운용암석박편、주체박편、소묘전경、음겁발광화물성측시등수단，상세연구료강당분지각목일지구강자5정중이첩통룡격조、하이첩통전금조탄산염암적암석학특정급저층물성。암석류형주요위니정회암、사설회암、세정백운암급분정백운암，저집공간주요포괄정간공、차생용공、구조봉화용식봉。회암공극도평균치위0.40％，삼투솔평균치위0.016×10-3μm2；백운암공극도평균치위2.73％，삼투솔평균치위0.012×10-3μm2，기본상속우저공저삼치밀저집층。종합평개료성암작용대저층물성적영향，통과대비분석구내룡격조회암여전금조백운암적성암작용급공삼삼수，인위백운석화작용능구보지심지제고원유암석적공극도，이거백운석화작용회도치공극도새，대저층적형성기파배작용。
Relying on the analytical techniques as rock thin section,cast section ,SEM,cathodoluminescence, conventional petrophysical property,etc.,a detailed description of the lithologic and reservoir physical proper-ties of middle and lower Permian carbonate rock is given inside the Qiangzi-5 borehole of Jiaomuri area Qiang-tang basin .The study shows that the carbonate reservoir is dominated by micritic limestone,sand-clastic lime-stone,fine dolomite and silty dolomite.The type of reservoir spaces includes pores (intercrystalline pore and sec-ondary solution pore)and fissures(structural fracture and solution fissure).The average porosity of limestone is 0.40%.The average permeability is 0.016 ×10 -3μm2.The average porosity of dolomite is 2.73%.The average permeability is 0.012 ×10 -3 μm2.The interstitial physical property parameters show both limestone and dolo-mite belonging to a dense reservoir with low porosity and low permeability.This paper also discusses the effects of different kinds of diagenesis on the improvement of the reservoir physical properties on limestone and dolo-mite.According to the study the pores can be well preserved and even improved due to dolomization.However dedolomitization occludes the pores,which exerts great unfavorable effects on the reservoir.