CAJ | 학술논문

利用区域地质、测井、砂岩薄片、铸体薄片、扫描电镜、X衍射分析等多种方法对鄂尔多斯盆地韩渠-张天渠地区长2油层沉积相和储层特征进行了综合分析研究.结果表明:该区长2时期发育三角洲平原沉积体系,广泛发育的分流河道砂体储集层为油气的聚集提供了有利场所,分流河道储层空间以原生粒间孔为主,孔隙度一般为15%左右,渗透率一般为5×10~(-3)μm~2 左右,属低孔低渗型储层.本区构造运动微弱,长2为构造-岩性油藏,分流河道砂体与长1沉积的泥岩盖层配置以及上倾方向分流间洼地的岩性遮挡是油气在长2 砂体中富集的主要控制因素.
이용구역지질、측정、사암박편、주체박편、소묘전경、X연사분석등다충방법대악이다사분지한거-장천거지구장2유층침적상화저층특정진행료종합분석연구.결과표명:해구장2시기발육삼각주평원침적체계,엄범발육적분류하도사체저집층위유기적취집제공료유리장소,분류하도저층공간이원생립간공위주,공극도일반위15%좌우,삼투솔일반위5×10~(-3)μm~2 좌우,속저공저삼형저층.본구구조운동미약,장2위구조-암성유장,분류하도사체여장1침적적니암개층배치이급상경방향분류간와지적암성차당시유기재장2 사체중부집적주요공제인소.
According to the comprehensive analysis of the regional geology, logging, sandstone thin section, casting lamella, scan electronmicroscope,X-ray diffractions and other means, the sedimentary facies and reservoir features of Chang 2 Formation in Hanqu-Zhangtianqu region of Ordos basin have been studied.The results show that the sand bodies of the Chang 2 oil reservoir are mainly deltaic plain deposits,and the distributary channel sand bodies in Chang 2 Formation are the advantageous places for Petroleum accumulation of this area. The main porosity type of reservoir is primary interparticle pore. The porosity and permeability of reservoir are about 15 % and 5×10~(-3)μm~2 separately, which belong to low porosity and low permeability reservoir. Located in the flat Shanbei slope with weak tectonic activities,Chang 2 oil pool belongs to the tectonic-lithologic pool. Channel sand bodies,lithologic lateral bareier and the shale cap rock of Chang 1 Group are the main dominant factors for the petroleum accumulation in Chang 2 sand bodies.