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首页> 外文期刊>Natural Gas Industry B >Physical simulation of gas reservoir formation in the Liwan 3-1 deep-water gas field in the Baiyun sag, Pearl River Mouth Basin
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Physical simulation of gas reservoir formation in the Liwan 3-1 deep-water gas field in the Baiyun sag, Pearl River Mouth Basin

机译：珠江口盆地白云凹陷荔湾3-1深水气田气藏形成的物理模拟

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摘要

To figure out the process and controlling factors of gas reservoir formation in deep-waters, based on an analysis of geological features, source of natural gas and process of reservoir formation in the Liwan 3-1 gas field, physical simulation experiment of the gas reservoir formation process has been performed, consequently, pattern and features of gas reservoir formation in the Baiyun sag has been found out. The results of the experiment show that: ① the formation of the Liwan 3-1 faulted anticline gas field is closely related to the longstanding active large faults, where natural gas is composed of a high proportion of hydrocarbons, a small amount of non-hydrocarbons, and the wet gas generated during highly mature stage shows obvious vertical migration signs; ② liquid hydrocarbons associated with natural gas there are derived from source rock of the Enping & Zhuhai Formation, whereas natural gas comes mainly from source rock of the Enping Formation, and source rock of the Wenchang Formation made a little contribution during the early Eocene period as well; ③ although there was gas migration and accumulation, yet most of the natural gas mainly scattered and dispersed due to the stronger activity of faults in the early period; later as fault activity gradually weakened, gas started to accumulate into reservoirs in the Baiyun sag; ④ there is stronger vertical migration of oil and gas than lateral migration, and the places where fault links effective source rocks with reservoirs are most likely for gas accumulation; ⑤ effective temporal-spatial coupling of source-fault-reservoir in late stage is the key to gas reservoir formation in the Baiyun sag; ⑥ the nearer the distance from a trap to a large-scale fault and hydrocarbon source kitchen, the more likely gas may accumulate in the trap in late stage, therefore gas accumulation efficiency is much lower for the traps which are far away from large-scale faults and hydrocarbon source kitchens.
机译：通过对荔湾3-1气田的地质特征，天然气来源和成藏过程进行分析，对深水气藏形成过程和控制因素进行了数值模拟，进行了成藏过程，从而发现了白云凹陷的气藏形成模式和特征。实验结果表明：①荔湾3-1断层背斜气田的形成与长期活动的大断层密切相关，天然气由高比例的碳氢化合物，少量的非碳氢化合物组成，高度成熟阶段产生的湿气表现出明显的垂直运移迹象; ②与天然气有关的液态烃类来自恩平组和珠海组烃源岩，天然气主要来自恩平组烃源岩，文昌组烃源岩在始新世初期贡献不大。好; ③尽管有天然气运移和聚集，但由于早期断层活动较强，大部分天然气主要散布和散布。后来随着断层活动逐渐减弱，天然气开始聚集到白云凹陷的储层中。 ④油气的垂直运移比横向运移要强，断层将有效烃源岩与储集层联系起来的地方最容易形成天然气。 ⑤后期源储层有效的时空耦合是白云凹陷天然气成藏的关键。 ⑥从疏水阀到大型断层和烃源厨房的距离越近，后期可能会在该疏水阀中积聚更多的气体，因此远离大型疏水阀的集气效率要低得多。断层和烃源厨房。

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