安徽淮南潘集外围深部地区山西组致密砂岩气成藏条件分析

ANALYSIS OF GAS RESERVOIRING CONDITIONS IN COMPACT SANDSTONE OF THE SHANXI FORMATION IN DEEP PERIPHERY OF PANJI,HUAINAN,ANHUI

分析安徽淮南潘集外围深部地区山西组致密砂岩气藏形成所需的烃源岩条件、致密储层条件及盖层条件。结果表明:潘集外围深部地区山西组烃源岩厚度大,分布稳定,烃源岩生烃潜力高,为致密气藏的形成提供了充足的物质基础。致密储层分布广泛,能够提供较大的储集空间,储集能力较好;气测录井显示致密储层C1异常幅度高,储层含气性好。在致密储层顶、底发育的泥岩盖层为气藏的形成提供了保护作用。认为研究区山西组具备形成致密砂岩气藏的先决条件,是下一步非常规天然气资源勘探的重点。

This paper analyzes source rock,tight reservoir and cap rock conditions for the formation of compact sandstone gas reservoirs in the Shanxi Formation in the deep periphery of Panji,Huainan,Anhui.The results show that hydrocarbon source rocks of the Shanxi Formation are thick in the depth around Panji,stable in distribution and have high potential for hydrocarbon generation,providing sufficient material basis for the formation of tight gas reservoirs.Tight reservoirs are widely distributed and can provide large space with good storage capacity.Gas logging shows that the tight reservoir C1 has a high abnormal range and good gas content.The mudstone cap rocks developed at the top and bottom of tight reservoirs providing protection for the formation of gas reservoirs.It is considered that the Shanxi Formation in the study area has prerequisite conditions for forming tight sandstone gas reservoir,which is the key spot for next unconventional gas resource exploration.