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埋藏期通过有机酸、TSR及热液等作用可以形成埋藏溶孔,这一观点已为大多数储层地质学家们所接受。随着中浅层油气资源勘探开发程度不断提高、难度不断增大,深层正成为油气战略发展的接替领域之一。但深层油气勘探开发的成本要比中浅层大得多,这就对深层碳酸盐岩储层的规模和预测精度提出了更高的要求。海相碳酸盐岩埋藏溶孔规模与分布规律正成为近期研究关注的焦点,而不仅仅是埋藏溶孔的形成机理。通过塔里木盆地和四川盆地深层碳酸盐岩储层(深度>4 500m)实例解剖及溶蚀量定量模拟实验、矿物成分对溶蚀强度影响模拟实验、储层物性对溶蚀强度影响模拟实验、岩性和孔隙组合对溶蚀效应影响模拟实验,提出开放体系是埋藏溶孔规模发育的关键、先存孔隙发育带控制埋藏溶孔的分布、储层岩性和孔隙组合控制埋藏溶孔的分布样式等新认识,初步回答了埋藏溶孔的规模和分布规律问题,为深层碳酸盐岩储层评价和预测提供了依据。
Buried pores formed by organic acids, TSRs and hydrothermal fluids are accepted by most reservoir geologists. With the continuous exploration and development of mid-shallow oil and gas resources, the degree of difficulty is continuously increasing, and the deep layer is becoming one of the successor areas for the strategic development of oil and gas. However, the cost of deep-seated oil and gas exploration and development is much larger than the middle and shallow levels, which puts forward higher requirements on the scale and prediction accuracy of deep-seated carbonate reservoirs. The scale and distribution of dissolved pores in marine carbonate rocks are becoming the focus of recent research rather than just the formation mechanism of buried dissolved pores. Through the numerical simulation experiments of the instability and dissolution of deep carbonate reservoirs (depth> 4 500m) in Tarim Basin and Sichuan Basin, the effects of mineral composition on the erosion strength are simulated and the effects of reservoir physical properties on dissolution strength are simulated. The lithology and The effects of pore assemblages on the erosion effect are simulated. The open system is the key to the scale development of buried pores. The preexisting pore development zone controls the distribution of buried pores, the lithology of reservoirs and the distribution pattern of buried pores by pore combination The preliminary answer to the problem of the size and distribution of burial dissolved pores provides the basis for the evaluation and prediction of deep carbonate reservoirs.