Petroleum geologic conditions and accumulation history of Middle Devonian, southern Guizhou province
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摘要: 贵州南部槽盆相沉积的中泥盆统独山组泥质烃源岩分布广泛,有机质丰度高,有机碳含量平均3.02%,干酪根显微组分显示以Ⅱ1型为主,少量为Ⅰ型,显示极好的生烃条件。碳酸盐岩和砂岩储层晶间、粒间孔隙及裂缝均十分发育,储集性能较好。盖层广泛分布,保存完好,具有较强的封盖性。油气显示表明,中泥盆统碳酸盐岩储层及砂岩储层中,均可见到不均匀有机质浸染或沥青充填。独山组中包裹体均一温度显示,该区具有两期油气充注。泥盆纪末期,贵州南部正处于紫云运动的抬升隆起区,成为早石炭世生油高峰阶段油气充注的有利区域,油气沿断裂向台地、台地边缘礁滩相灰岩储层及滨岸相砂岩储层运聚,可形成一定规模的油气藏。Abstract: In the Dushan Formation of the Middle Devonian in the southern Guizhou province, the mudstone source rocks of trough-basin facies are widespread with high organic abundance. The average organic carbon content is 3.02%. Most of the kerogens are of type Ⅱ1, and some are of type Ⅰ, indicating for excellent hydrocarbon generation conditions. In carbonate and sandstone reservoirs, intergranular, intergranular pores and cracks develop well. Cap rocks distribute widely and are preserved well, indicating for strong sealing capacity. Petroleum shows prove that, in both carbonate and sandstone reservoirs in the Middle Devonian, uneven organic matter or asphalt infillings can be found. The homogenization temperatures of fluid inclusions in the Dushan Formation show that the study area has experienced 2 phases of hydrocarbon charging. At the end of Devonian, the southern Guishou province was the uplifting area of the Ziyun Movement, hence was favorable for petroleum charging during the early Carboniferous. Petroleum migrated along cracks to the reef flat limestone reservoirs and the littoral sandstone reservoirs in platforms and platform edges.
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[1] 周雁.垭都—紫云—罗甸断裂带及其对两侧盆地成藏条件影响研究.成都:中国石化勘探南方分公司,2008. [2] 曾宪斌,张静华,金惠,等.中国主要气区海相沉积层序特点与大中型气田分布规律[J].石油实验地质,2000,22(4):325-329. [3] 陈洪德,覃建雄,田景春,等.中国南方古生界层序格架中的生储盖组合类型及特征[J].石油与天然气地质,2004,25(1):62-69. [4] 梁狄刚,郭彤楼,陈建平,等.中国南方海相生烃成藏研究的若干新进展(一):南方四套区域性海相烃源岩的分布[J].海相油气地质,2008,13(2):1-16. [5] 蔡勋育,韦宝东,赵培荣.南方海相烃源岩特征分析[J].天然气工业,2005,25(3):20-24. [6] 张水昌,张宝民,边立曾,等.中国海相烃源岩发育控制因素[J].地学前缘,2005,12(3):39-48. [7] 陈践发,张水昌,鲍志东,等.海相优质烃源岩发育的主要影响因素及沉积环境[J].海相油气地质,2006,11(3):49-54. [8] 陈洪德,福喜,徐胜林,等.中上扬子地区碳酸盐岩储层发育分布规律及主控因素[J].矿物岩石,2009,29(4):7-9. [9] 陆亚秋,龚一鸣.海相油气区生物礁研究现状、问题与展望[J].地球科学——中国地质大学学报,2007,32(6):871-878. [10] 罗平,张静,刘伟,等.中国海相碳酸盐岩油气储层基本特征[J].地学前缘,2008,15(1):36-50. [11] 何治亮,汪新伟,李双建,等.中上扬子地区燕山运动及其对油气保存的影响[J].石油实验地质,2011,33(1):1-11. [12] 周雁,金之钧,朱东亚,等.油气盖层研究现状与认识进展[J].石油实验地质,2012,34(3):234-245. [13] 刘光祥,沃玉进,潘文蕾,等.中上扬子区海相层系流体特征与油气保存条件[J].石油实验地质,2011,33(1):17-21. [14] 刘伟新,承秋泉,范明,等.压力封盖和异常压力系统研究[J].石油实验地质,2011,33(1):74-80. [15] 王津义,付孝悦,潘文蕾,等.黔西北地区下古生界盖层条件研究[J].石油实验地质,2007,29(5):477-481. [16] 肖开华,沃玉进,周雁,等.中国南方海相层系油气成藏特点与勘探方向[J].石油与天然气地质,2006,27(3):316-325. [17] 白森舒,彭金宁,刘光祥,等.黔南安顺凹陷油气成藏特征及勘探潜力分析[J].石油实验地质,2013,35(1):24-28. [18] 蔡立国.中国南方海相油气勘探主要研究方向[J].石油实验地质,2003,25(6):634-636. [19] 金之钧.中国海相碳酸盐岩层系油气勘探特殊性问题[J].地学前缘,2005,12(3):15-22. -
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