开江—梁平台内海槽东段长兴组白云岩储层沉积-成岩系统研究
发布时间：2018-12-12 06:50
【摘要】：为了指导部署四川盆地白云岩储层中钻井,在油气钻井岩心观察与描述、野外剖面实测和样品采集的基础上,结合镜下薄片鉴定、X衍射、物性和地球化学特征分析,对开江—梁平台内海槽东段长兴组白云岩储层的沉积-成岩系统进行了深入研究。认为台地边缘生物礁和台地边缘浅滩为最重要的储集相带,颗粒白云岩、生物礁白云岩和晶粒白云岩为最主要的储集层岩性,晶间孔、晶间溶孔和超大溶孔为目的层最有效的储集空间,孔洞缝复合型储层为目的层最优质的储集类型。综合分析认为,长兴组沉积-成岩系统与白云岩储层在时空上具有良好的耦合关系,台地边缘生物礁和台地边缘浅滩相控制了白云岩储层的区域分布范围,而不同成岩系统对储层的贡献程度不同。其中:地层封存卤水与混合热卤水成岩系统是储层形成的基础与关键,地层封存卤水形成低孔低渗的孔隙型Ⅲ类储层,混合热卤水形成中孔中渗的孔洞型Ⅱ类储层;构造热液成岩系统对储层贡献最大,并形成高孔高渗的孔洞缝复合型Ⅰ类优质储层。
[Abstract]:In order to guide the deployment of drilling in dolomite reservoirs in Sichuan Basin, on the basis of core observation and description of oil and gas drilling, field profile measurement and sample collection, combined with microscopic slice identification, X-ray diffraction, physical properties and geochemical analysis, The sedimentary-diagenetic system of the dolomite reservoir of Changxing formation in the eastern section of the Kaijiang-Liang platform is studied. It is considered that the reef and shoal of platform margin are the most important reservoir facies zone, and granular dolomite, reef dolomite and grain dolomite are the most important reservoir lithology and intergranular pore. Intergranular dissolved pores and super-large dissolved pores are the most effective reservoir space for the target layer, and the porous fracture composite reservoir is the best reservoir type for the target layer. It is concluded that the sedimentary diagenetic system of Changxing formation has a good coupling with dolomite reservoir in time and space, and the platform edge reef and platform edge shoal facies control the regional distribution of dolomite reservoir. The contribution of different diagenetic systems to reservoir is different. The formation seal and storage of brine and the diagenetic system of mixed hot brine water are the basis and key of reservoir formation. The formation seal brine forms low porosity and low permeability type 鈪，
本文编号：2374126
[Abstract]:In order to guide the deployment of drilling in dolomite reservoirs in Sichuan Basin, on the basis of core observation and description of oil and gas drilling, field profile measurement and sample collection, combined with microscopic slice identification, X-ray diffraction, physical properties and geochemical analysis, The sedimentary-diagenetic system of the dolomite reservoir of Changxing formation in the eastern section of the Kaijiang-Liang platform is studied. It is considered that the reef and shoal of platform margin are the most important reservoir facies zone, and granular dolomite, reef dolomite and grain dolomite are the most important reservoir lithology and intergranular pore. Intergranular dissolved pores and super-large dissolved pores are the most effective reservoir space for the target layer, and the porous fracture composite reservoir is the best reservoir type for the target layer. It is concluded that the sedimentary diagenetic system of Changxing formation has a good coupling with dolomite reservoir in time and space, and the platform edge reef and platform edge shoal facies control the regional distribution of dolomite reservoir. The contribution of different diagenetic systems to reservoir is different. The formation seal and storage of brine and the diagenetic system of mixed hot brine water are the basis and key of reservoir formation. The formation seal brine forms low porosity and low permeability type 鈪，
本文编号：2374126
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