CAJ | 학술논문

靖安油田五里湾一区是一个大型的低渗透油气开发区，长6储层具有高孔低渗的特征。储层以原生剩余粒间孔隙为主，长石及早期碳酸盐胶结物的溶解是形成次生孔隙的主要原因。中孔（20 μm～50 μm）和大孔（50 μm～100 μm）是油气的主要储集空间，而细喉(1 μm～3 μm)和中喉（3 μm～7 μm）则是长6基本的渗流通道。根据均值与细喉以上孔隙所占百分比的关系曲线，可将长6储层孔隙结构分为4种类型，其中Ⅰ类、Ⅱ类具有较好的孔渗性，Ⅲ类孔隙结构较差，Ⅳ类为非储层孔隙结构。铸体薄片孔喉图象分析表明，长6储层具有复杂的孔喉分布特征，不同微相孔喉分布及孔隙结构特征是造成油井产能差异的重要因素。
정안유전오리만일구시일개대형적저삼투유기개발구，장6저층구유고공저삼적특정。저층이원생잉여립간공극위주，장석급조기탄산염효결물적용해시형성차생공극적주요원인。중공（20 μm～50 μm）화대공（50 μm～100 μm）시유기적주요저집공간，이세후(1 μm～3 μm)화중후（3 μm～7 μm）칙시장6기본적삼류통도。근거균치여세후이상공극소점백분비적관계곡선，가장장6저층공극결구분위4충류형，기중Ⅰ류、Ⅱ류구유교호적공삼성，Ⅲ류공극결구교차，Ⅳ류위비저층공극결구。주체박편공후도상분석표명，장6저층구유복잡적공후분포특정，불동미상공후분포급공극결구특정시조성유정산능차이적중요인소。
The Wuliwanyiqu of Jingan oilfield is a large-scale,low-permeable development area of oil-gas. The Chang6 reservoir is characterized by high pore and low permeability. The main pore type of the reservoir is primary remained intergranular pore, the dissolution of the feldspar and early carbonate cement results in the secondary pore.Most reserved space is mesopore(20 μm～50 μm)and macropore(50 μm～100 μm),and fine throat(1 μm～3 μm)and midthroat(3 μm～7 μm)is the basic seepage passage. According to relation curve of average value and fine-throat porosity , pore structure of the reservoir Chang6 is divided into four types. Type Ⅰand Ⅱ have well-developed porosity and permeability, type Ⅲ has poorly developed pore structure ,type Ⅳ is of non-reservoir pore structure of non-reservoir. Pore-throat image of thin-section shows the reservoir Chang6 has complicated pore-throat distributed character. Various pore-throat distribution of microfacies and various pore structure characters are important factor that leads to difference of oil-well productivity .