安棚深层系低渗透砂岩油藏裂缝研究

方法利用岩心观察、铸体薄片鉴定、电测解释等方法，对安棚深层系低渗透砂岩油藏裂缝进行了研究。目的认识和评价该深层系裂缝的发育、分布状况，分类及其对油气的作用，以便合理、高效开发该油藏。结果安棚深层系发育裂缝，其中以中、小裂缝为主；裂缝分布不均匀，纵向上Ⅴ砂组裂缝较发育，横向上Ｂ２４６、Ｂ１８５等井裂缝较发育。结论安棚深层系裂缝的产生主要与构造应力作用有关，其发育程度与裂缝所处构造带位置有关；裂缝的存在不仅改善了油气层的物性特征，而且增强了对油气的储藏能力

Study on fractures and fissures of low permeability sandstone reservoirs in Anpeng deep zone.

Method\ Using core analysis, cast body thin slice identification, E-logging interpretation and etc, fractures and fissures of low permeability sandstone reservoirs in Anpeng deep zone are studied. Purpose\ To evaluate and understand development, distribution, identification of fractures/fissures in this deep zone and their influence up on hydrocarbon, so as to develop same reservoirs reasonably and cost-effectively. Result\ Fractures and fissures developed in Anpeng deep zone, mainly medium-small ones, are not evenly distributed, i.e. those of V sand-group are relatively developed in vertical but same appeared on lateral in well B246, B185, etc. Conclusion\ Origin of fractures and fissures in Anpeng deep zone are mainly concerned with tectonic stress and its development degree is related with its tectonic location. Fractures/fissures have both improved physical property and increased storage capability of hydrocarbon formations.