从全球油气田分布看我国东南沿海火山岩覆盖区的含油气前景

HYDROCARBON-BEARING PROSPECTS OF VOLCANIC ROCK COVE RED REGIONS IN THE SOUTHEASTERN COASTAL WATERS OF CHINA JUDGED BY THE DISTRIBUTION OF GLOBAL OIL AND GAS FIELDS

郭占谦

GUO Zhan-qian

大庆石油管理局勘探开发研究院, 黑龙江大庆 163712

Research Institute of Petroleum Exploration and Development, Daging Bureou of Petroleum Administration, Daqing, Heilongjiang 163712, China

中国科学院马宗晋院士据全球地震的分布将全球最活动的构造划为环太平洋、大洋脊与北大陆3个一级构造系。纵观全球油气田分布发现,它们与全球最活动的3个一级构造区密切相关,分布在显生宙火山岩带附近。我国渤海湾盆地的油气田与新生界火山岩体相伴分布,美国SacramentoBasin的气田与现代火山口错叠重合,这些现象都说明石油、天然气与地球深部物质供给密切相关。天然地震为地壳表层带来火山岩活动、地下水和天然气的外泄,而火山活动的岩浆为火山岩覆盖区带来了有机质灶体生烃模型,火山岩活动的岩浆还带来了无机成因烃,地下水为有机质带来了催化生烃模型、外泄的H2与CO2又带来了合成生烃模型。地壳活动区存在着多种生烃机制的多种生烃模型;地壳活动区的火山活动为沉积盆地带来沉积与岩浆形成的储、盖、圈组合,构成“水火”二元结构成油系统。火山活动为火山岩覆盖区带来了多种生烃模型生成的多种油气供给和沉积岩与火山岩形成的二元结构的储、盖、圈组合,更有利于油气田的形成。因此,我国东南沿海火山岩覆盖区应是有含油前景的地区。

Ma Zong-jin, an academician of Academia Sinica, divided the most active tectonics in the world into circum-Pacific, ocean ridge and north continental three first-order tectonic systems according to global seismic distribution. It is shown by scanning the distribution of global oil and gas fields that they are closely related to the three most active first-order tectonic areas in the world and are distributed near the Phanerozoic volcanic rock belts. The oil and gas fields in the Bohaiwan Basin of China are distributed accompanying the Cenozoic volcanic rock bodies, and the gas fields in the Sacramento Basin of America are faulted superimposed and superpositioned with modern craters. These phenomena show that petroleum and natural gas are closely related to the supply of the Earth's deep seated matter. Spontaneous earthquakes bring about volcanic activities, underground water and natural gas discharge for supracrust. The magma of volcanic activities causes the organic matter "kitchen body" hydrocarbon-generating model for volcanic rock-covered areas, and brings about inorganic matter-ganetic hydrocarbon. Underground water causes the catalytic hydrocarbon-generating model for organic matter, and discharged H2 and CO2 cause the synthetic hydrocarbon-generating model. Crust active areas have many kinds of hydrocarbon-generating mechanism and models. Volcanic activities in crust active areas bring about reservoir cover trap assemblages formed by sediments and magma for sedimentary basins, and constitute hydrocarbon-generating systems of "water-fire" binary structure. Volcanic activities bring about many kinds of hydrocarbon supply caused by many kinds of hydrocarbon-generating models and binary structural reservoir-cover-trap assemblages formed by sedimentary and volcanic rocks for volcanic rock-covered areas. This is advantageous to the formation of oil and gas fields. Thus, the volcanic rock-covered areas in the southeastern coastal waters of China should be prospecting areas for petroleum.

https://doi.org/10.11781/sysydz200102122