摘要
陕155井区产气层位,为古生代早奥陶纪马家沟期沉积的以白云岩、膏岩为主的马五段,且尤其以马五13为主力产气层。马五1储层空间类型为孔隙型,且以次生溶蚀孔洞发育为主。其马五1储层,纵向上表现为上、下段孔隙发育较差、中部马五13发育较好。马五1储层发育的控制因素主要为构造特征、沉积成岩作用及储层残余岩溶强度等。通过储层综合评价研究得出,马五1储层可分为好、中、差储层等3种类型,其平面上表现为好、中等储层在全区大面积分布,呈连片状,差储层的井点仅零星分布。
Around well Shan 155 , the gas-producing interval is early Ordovician Majiagou 5 Member, which is mainly composed of limestone and gypsum, especially Majiagou 5_1~3. With secondary solution pores as the soul, Majiagou 5_1 Member is featured by porous reservoir. Longitudinally, this member displays poor pore development at upper and lower parts whereas better development at middle part, Majiagou 5_1~3. In addition, the factors influencing on reservoir development are structural features, sedimentary diagenesis and residual solution extent. As indicated by comprehensive reservoir evaluation, Majiagou 5_1 Member constitutes three types of reservoirs, good, moderate and poor, individually. Laterally, good and moderate reservoirs are widespread and sheet in shape whereas poor reservoirs are just scattering.
出处
《天然气勘探与开发》
2006年第3期26-29,共4页
Natural Gas Exploration and Development
关键词
气田
下奥陶统
储集层特征
gas field, lower Ordovician, reservoir characteristics
