论文部分内容阅读
珠江口盆地珠一坳陷在以往的油气发现中主要以珠江组为主(埋深2000～3000m),但在近几年的勘探实践中,以韩江组、粤海组为主的中浅层(埋深500～2000m)渐渐有了新的发现和惊喜。在对浅层资料系统研究的基础上,分析了浅层的成藏条件与勘探潜力:①富烃洼陷为珠一坳陷浅层油气成藏提供了巨大的烃源潜力;②古珠江三角洲沉积体系为浅层油气成藏提供了储盖条件;③浅层断圈和自圈等构造型圈闭发育,具有丰富的目标潜力;④由多介质构成的网状输导格架形成了多类型输导通道,形成了浅层优越的油气运移条件。在此基础上预测了珠一坳陷浅层勘探的有利区带,主要集中在PY4洼、EP凹陷及HZ凹陷西部等地区。
The Pearl River Mouth Basin Pearl River Basin in the past mainly in the discovery of the Pearl River Group (mainly buried depth of 2000 ~ 3000m), but in recent years of exploration, the Hanjiang Formation, Guangdong Group mainly in the shallow Layer (depth 500 ~ 2000m) gradually with new discoveries and surprises. Based on the research of shallow data system, the shallow reservoir forming conditions and exploration potential are analyzed: (1) The hydrocarbon-rich depressions provide great hydrocarbon potential for shallow hydrocarbon accumulation in the Zhu-1 depression; (2) the ancient Pearl River Delta Sedimentary systems provide reservoir cap conditions for shallow hydrocarbon accumulation; (3) structural faults such as shallow fault ring and self-trap developed with rich target potentials; (4) Mesh-shaped guide grids formed by multi-media formed more Type of conduction channel, forming a superficial shallow hydrocarbon migration conditions. On this basis, the favorable zones for shallow exploration in the Zhuya depression are predicted, mainly in PY4 depression, EP depression and western HZ depression.