流体—岩石化学作用控制的成岩相划分与评价——以江家店—瓦屋地区沙三段下亚段为例  

Division and evaluation of diagenetic facies of reservoirs in the control of fluid-rock chemical interaction:A case study of the lower Es_3 in Jiangjiadian-Wawu area

作　　者：滕建彬[1] Teng Jianbin(Exploration and Development Research Institute,Shengli Oilfield Company, SINOPEC,Dongying City,Shandong Province,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2017年第3期1-9,共9页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"济阳坳陷页岩油勘探开发目标评价"(2017ZX05049-004);中国石化科技攻关项目"致密砂砾岩储层伤害机理与保护改造措施研究"(P14019);中国石化科技重大项目"济阳坳陷油气聚集规律及精细评价关键技术"(ZDP17008)

摘　　要：从流体—岩石化学作用出发,建立地层水类型与填隙物发育特征之间的关系,有助于准确预测有利储层的发育。利用储层微观分析技术,从分析地层水性质与成岩矿物的关系入手,综合解剖江家店—瓦屋地区沙三段下亚段发育的沉积微相和成岩相特征。结果表明,研究区目的层段主要发育水上分流河道、水下分流河道、河口坝和前缘席状砂等有利沉积微相,识别出的CaCl_2型、CaCl_2-NaHCO_3型和NaHCO_3-Na_2SO_4型这3种地层水类型主要发育在地层水交替阻滞带、地层水过渡带和地层水交替停滞带,岩矿差异和地层水性质决定了研究区特定的流体—岩石化学作用,具有明显的中成岩阶段A期特征,受控于沉积微相和成岩相,形成弱压实泥质杂基充填+铁白云石胶结相、中等压实泥质杂基+碳酸盐胶结相、强压实碳酸盐胶结相、强压实泥质杂基充填相和强压实石英压溶+长石溶蚀相5种成岩相。各类成岩相具有不同的成岩效应,决定了储层扩容化和致密化的方式及特点。通过对成岩相、沉积微相和砂体等厚图等图件的叠合,分级评价了不同沉积微相和成岩相控制的储层发育特点。The relationship between formation water type and fillings material was established based on the chemical interaction between the fluid and the rock,which is helpful for accurate prediction of favorable reservoir development. Starting with the analysis of the relationship between the formation water property and the diagenetic mineral,the sedimentary microfacies and diagenetic facies developed in the lower Es3 in Jiangjiadian-Wawu area were analyzed comprehensively using microscopic analysis techniques. The results show that water distributary channel,underwater distributary channel,mouth bar and front sheet sand develop mainly in the target formation of the study area. Three types of formation water assemblag?es, CaCl2 type, CaCl2-NaHCO3 type and NaHCO3-Na2SO4 type, were identified, and they mainly develop in areas of the for?mation water block zone, the transition zone and the stagnation zone, repecitvely. The specific fluid-rock chemical interac?tion in the study area was determined by rock mineral difference and formation water properties,which has obvious charac?teristics of A stage in the middle diagenesis process and is controlled by sedimentary microfacies and diagenetic facies.Five types of diagenetic facies were identified and named as weak-compacted clay-filled and ferrodolomite-cemented fa?cies,moderate-compacted clay-filled and carbonate-cemented facies,strong-compacted carbonate-cemented facies,strong-compacted clay-filled facies,strong-compacted quartz and feldspar-corroded facies. Different diagenetic facies have different diagenetic effects,which determines the way and the characteristics of reservoir dilatation and densification.The characteristics of reservoir development controlled by different sedimentary microfacies and diagenetic facies were evaluated by classification through superposition of diagenetic facies,sedimentary microfacies and isopach charts of sand bodies.

关 键 词：流体-岩石化学作用 沉积微相 成岩相 成岩效应 临南洼陷 

分 类 号：TE112.24[石油与天然气工程—油气勘探]