| 中国海相碳酸盐岩层系油气贫化与次生成藏 |
| |
| 引用本文： | 蔡立国,李双建,刘全有,汪新伟,张荣强.中国海相碳酸盐岩层系油气贫化与次生成藏[J].地质科学,2012,0(4):1211-1222. |
| |
| 作者姓名： | 蔡立国 李双建 刘全有 汪新伟 张荣强 |
| |
| 作者单位： | 中国石油化工股份有限公司石油勘探开发研究院 北京 100083 |
| |
| 摘 要： | 我国海相层系经过多期构造运动的叠加,油气地质条件除受"先天条件"的影响外,"后天因素"的影响更加突出,表现在现今油气成藏虽仍以海相烃源为主,但油气成藏与油气主要生烃高峰多已不匹配; 油气相态多已发生变化,如四川盆地从含油盆地转为含气盆地; 油气富集过程受构造影响而发生了改变,油气藏规模因此发生了变化,表现出油气藏的破坏规模缩小,或随断层的切割,油气发生泄露,向上运聚到浅层形成次生油气藏,导致油气贫化。因此,具有多期成藏、多期改造、相态转化及晚期就位的特点。现今海相层系发现的油气藏实际上已经是经过"变位、变相"的残留及次生油气藏。针对这一特性,在海相层系油气勘探中更应注意后期油气藏演化所带来的特殊性,进一步深化整体保存环境对油气藏形成、保持的影响。
|
| 关 键 词： | 海相 碳酸盐岩层系 油气转化 保存条件 次生油气藏 |
| 收稿时间： | 2012-06-05 |
| 修稿时间： | 2012-06-05; |
Dilution and secondary accumulation of oil and gas in Chinese marine carbonate sequence |
| |
| Cai Liguo,Li Shuangjian,Liu Quanyou,Wang Xinwei,Zhang Rongqiang.Dilution and secondary accumulation of oil and gas in Chinese marine carbonate sequence[J].Chinese Journal of Geology,2012,0(4):1211-1222. |
| |
| Authors: | Cai Liguo Li Shuangjian Liu Quanyou Wang Xinwei Zhang Rongqiang |
| |
| Institution: | Exploration & Production Research Institute,Sinopec,Beijing 100083 |
| |
| Abstract: | After multi-stage superimposing of tectonic movement,the petroleum geological conditions of the marine sequence in China are influenced increasingly by the postnatal factors,besides the "innate conditions",which is shown in the following aspects:1)present oil/gas sourced from the marine hydrocarbon source rocks,but the oil/gas accumulation does not match with the main peak hydrocarbon-generation in most cases; 2)oil/gas phase behaviors have been changed in most cases,such as the Sichuan Basin has changed from the oil bearing basin to gas bearing one; 3)hydrocarbon accumulation process changed under the influence of the tectonic setting,thus causing the change of the oil/gas reservoir size,which is shown by the shrinking failure scale of the oil/gas reservoirs or the leak of gas or oil with fault cuts,which moves upwards to concentrate in the shallow strata,forming the secondary oil and gas reservoirs,and causing the dilution of oil and gas accumulated in the marine sequence.The marine sequences are featured by multi-stage accumulation,multi-stage transformation,phase change,late location,and secondary accumulation.The oil and gas reservoirs discovered at present are the residual and secondary oil and gas reservoirs which have undergone the relocation and phase change.Thus,the particularities caused by the evolution of late oil and gas reservoirs should be given more attention in the oil and gas exploration in the marine sequence to deepen the influence of the overall preservation of environment on the formation and preservation of oil and gas reservoirs. |
| |
| Keywords: | Innate and postnatal factors Relocation Phase change Residual reservoir Secondary reservoirs |
|
| 点击此处可从《地质科学》浏览原始摘要信息 |
| 点击此处可从《地质科学》下载免费的PDF全文 |
|
