摘要
从构造演化、古油藏的埋藏史、热史与成藏条件等分析入手,探讨了黔中隆起及周缘地区油气成藏规律。指出:①油气成藏期以加里东期为主,加里东期古隆起是控制油气成藏的重要因素;②抬升剥蚀作用使早期油气藏被改造和破坏,燕山—喜山期构造运动是造成本区早期油气全面破坏的主导因素;③加里东期存在与油气演化有着良好配置关系的古圈闭和储盖组合,所以形成了环绕古隆起分布的大型加里东期古油气藏;印支—燕山期缺乏与油气演化有着良好配置关系的构造圈闭(古隆起)和储盖组合,导致本区晚期成藏条件相对较为不利;④埋藏差异造成本区油气演化程度差异较大,但目前仍存在寻找油气的客观条件。
Oil and gas reservoir-forming laws in the Central-Guizhou Uplift and its circumferential areas have been discussed according to the analysis on the tectonic evolution, burial history of paleoreservoir, thermal history and reservoir-forming condition. Results show that (1) Caledonian stage is the main reservoir-forming time and the paleouplift in this stage is the dominate influence on the oil and gas reservoir formation; (2) uplift and erosion might reconstruct and damage early oil and gas reservoirs, and the tectonic movement in Yanshanian-Himalayan stage brought about a comprehensive damage for early oil and gas in the Central-Guizhou and its circumferential areas; (3) related to oil and gas evolution very well, the paleotrap and reservoir-caprock assemblage existed in Caledonian stage in order to form large-sized Caledonian paleoreservoir around paleouplift whereas the tectonic trap (paleouplift) and reservoir-caprock assemblage having a better relationship with oil and gas evolution did not exist in Indosinian-Yanshanian stage, which leads to a relatively poor reservoir-forming condition in late stage; (4) a huge difference of oil and gas evolution was caused by burial difference. However, there exists a chance to find out oil and gas in the Central-Guizhou and its circumferential areas.
出处
《天然气勘探与开发》
2008年第2期1-7,共7页
Natural Gas Exploration and Development
关键词
构造演化
古油藏
埋藏史
油气成藏条件
tectonic evolution, paleoreservoir, burial history, oil and gas reservoir-forming condition
