渤海湾盆地深潜山综合物探的潜力与展望

Discussion on Necessary and Feasibility of Development Integrated Geophysical Exploration Technology in Deep Buried Hill, Bohai Gulf Basin

渤海湾盆地深层发育下第三系下部和石炭、二叠系两套主力烃源岩,蕴藏有丰富的尚未探明的油气资源,各种类型的深潜山是其主要的成藏类型。重磁电技术对潜山勘探具有良好的物性条件,理论上的正反演及勘探实践都表明重磁电技术对深潜山勘探是可行的、有效的,重磁电震综合物探是解决深层等复杂地质问题的有效手段。现有20世纪60～70年代完成的1:10万或1:20万重磁电资料网度稀、精度差,已不能满足当前目标勘探的需要;而现代采集、解释技术的进步为解决深层等复杂地质问题提供了可能,因此,为石油工业可持续发展寻找急需的后备储量,针对深层新领域新一轮的综合物探势在必行。

Two suites of major hydrocarbon source rock were developed in the lower part of Lower Tertiary, and Carboniferous-Permian in Bohai Gulf Basin, enriching unproved oil and gas resource. There oil and gas reservoirs are various kinds of deeply buried hills. Gravity, magnetic and electric methods in these areas can provide favorable geophysical condition, and the feasibility and effectiveness applied in the deep Buried hills has been confirmed by forward and inversion method and practices. The existing non-seismic data including gravity, magnetic and electric data acquired in 1960s and 1970s are on the scale of 1:100 thousand or 1:200 thousand with sparse survey net and low precision, which can not satisfy the purpose of the present target exploration. Modern advanced acquisition and interpretation techniques make it possible to clarify deep complex geological issues and to find sustainable reserves for development of petroleum industry. So it is necessary to conduct new round comprehensive geophysical exploration for deep formation and new fields.