白云凹陷浅层气开采过程中储层性质的影响因素
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中海石油深海开发有限公司项目(SCKY-2022-SHENHAI-05)


Study on influencing factors of reservoir properties during shallow gas exploitation in Baiyun Depression, South China Sea
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    摘要:

    由于深水浅部地层胶结性差、强度低,浅层气开采过程中极易出现储层失稳坍塌情况,严重制约浅层气的产能,为了深入了解浅层气开采过程中储层变化规律,开展了不同粘土含量、主控开采参数和孔隙度的模拟实验,分析其对储层产气和产水情况的影响。研究结果表明:压敏效应和微粒运移同时存在,近井端压敏效应造成的渗透率损伤更严重,在保证地层稳定的前提下,随着时间推移,小程度的微粒运移可使孔隙连通性增加,对稳定产气、提高渗透率有积极作用;随着气体产出,储层内水分也会被携带产出,且部分束缚水会转化为可动水,所得结论可为海域浅层气井的防砂增产提供参考。

    Abstract:

    Due to the poor cementation and low strength of shallow strata in deep water, reservoir instability and collapse are easy to occur in the process of shallow gas exploitation, which seriously restricts the production capacity of shallow gas. In order to understand the reservoir variation law during shallow gas production, the simulation experiments of different clay content, main control mining parameters and porosity were carried out to analyze the influencing factors of gas and water production. The results show that pressure sensitive effect and particle transport exist simultaneously. The permeability damage caused by the pressure sensitive effect near the wellbore is more serious. Under the premise of ensuring formation stability, a small degree of particle migration can increase pore connectivity over time, which has a positive effect on stable gas production and increased permeability. With the gas production, the water in the reservoir will also be carried and produced, and part of the irreducible water will be transformed into movable water. The conclusion can provide reference for sand control and stimulation of shallow gas wells in sea area.

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何泽俊,李冰,张国彪,等. 白云凹陷浅层气开采过程中储层性质的影响因素[J]. 科学技术与工程, 2024, 24(18): 7630-7638.
He Zejun, Li Bing, Zhang Guobiao, et al. Study on influencing factors of reservoir properties during shallow gas exploitation in Baiyun Depression, South China Sea[J]. Science Technology and Engineering,2024,24(18):7630-7638.

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  • 收稿日期:2024-02-19
  • 最后修改日期:2024-06-20
  • 录用日期:2024-05-11
  • 在线发布日期: 2024-07-05
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