嫩1区块直井缝网压裂评价

Evaluation of Straight Well Network Fracturing in Nen Block 1 Block

直井缝网压裂技术是新兴的一种压裂方式,依靠滑溜水无造壁性,复杂缝网形成以剪切断裂为主,具体以微小张性裂缝形式存在和滑溜水滤失系数高,扩冲滤失通道,对孔隙产生挤压,迫使孔隙压力升高,产生微小张性破裂,液体渗入微破裂,再挤压原始储层,扩大破裂,整体提高改造体积。嫩1区块通过开展缝网压裂技术试验取得了显著的增产效果,为低渗储层提高采收率提供了一条新的途径。

Straight well seam fracturing technology is a fracturing method emerging this year.By relying on slick water without building wall,the complex seam network is mainly formed by shear fractures,and it exists in the form of tiny tensile cracks and slick water.The high filtration coefficient,extended filtration and loss of channels,generates extrusion of the pores,forcing the pore pressure to rise,resulting in micro-tensile fractures,liquids infiltrating into micro-cracks,then squeezing the original reservoir,expanding the fracture,and increasing the overall volume of reconstruction.The Nen-1 block has achieved a significant increase in production by conducting seam-fracturing technology tests,providing a new way for low-permeability reservoirs to improve oil recovery.