中国中西部地区海相碳酸盐岩油气藏类型和成藏模式.pdfVIP

31 6 Vol. 31 No . 6 2 010 11 ACTA PET ROLEI SIN ICA Nov. 20 10 : 0253- 2 697( 20 10) 0 6- 0871- 08 朱光有 张水昌 张 斌 苏 劲 杨德彬 ( 100083) : 海相碳酸盐岩是近年来中国油气勘探的重要领域由于中国海相盆地碳酸盐岩时代古老, 使得油气 布十 复杂, 勘探难 度大研究认为, 中国中西部地区三 个主要海相盆地古生界都发育优质烃源岩, 主要以泥岩泥灰岩和煤系为主, 热演化程度多数 已进入高 过成熟阶段其中, 四川盆地和鄂尔多斯盆地碳酸盐岩组合在燕山期达到最大埋深, 储层大部 都经历过原油裂解以 上的高温过程, 原油难以保存, 以形成裂解气为主, 或者是高成熟煤型气; 而塔里木盆地塔中和塔北继承性隆起部位始终没有经历 180 以上的高温条件, 而且最大埋深是在喜山期以来, 因此在构造高部位保存了大规模的古油藏根据海相碳酸盐岩油气藏被调 整改造与再富集过程的特点, 把中国中西部地区海相碳酸盐岩油气藏类型 为原生油气藏和次生油气藏, 存在单源单期充注成藏 型和多源多期充注成藏型, 建立了中国中西部地区海相碳酸盐岩油气的成藏模式 : 海相; 碳酸盐岩; 原油裂解气; 油气藏类型; 调整改造; 成藏模式 : T E11232 : A Reservoir types of marine carbonates and their accumulation model in western and central China ZHU Guang ou ZHANG Shuichang ZHANG Bin SU Jin YANG Debin (State Key Laboratory of Enhanced Oil Recovery, PetroChinaResearch Institute of Petroleum Exp loration Develop ment, Beij ing 10 00 83, China) Abstract: Recent ears the exploration of h drocarbons in marine carbonates has been one of the most important domains in China. H drocarbon distributions of carbonates in marine basins of China are complicated because of t he age combination and long evolution ar histor , resulting in difficulties in exploration. Studies showed t hat Paleozoic highqualit source rocks composed mainl of mud stones, marls and coals w ith highor overmat urit developed in three major marine basins of western and cent ral China. Of w hich, carbonate units in Sichuan Basin and Ordos Basin show ed the max imum depth in the Y anshan period and most reservoirs in these ba sins experienced high temperatures of oil cracking, containing little oil but mainl cracked gas or highmaturit coalt pe g