一种致密油气藏混合水压裂参数确定方法

• Format: Patent
• Language: Chinese
• Published: 15.04.2025
• Subjects: CALCULATING; COMPUTING; COUNTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS

本发明涉及一种致密油气藏混合水压裂参数确定方法，属于采油工程技术领域。本发明利用综合可压性模型及岩石弹性力学参数模拟计算出区域水平两向应力差分布，并采用三维裂缝模型分析混合水压裂工艺下各压裂参数下的裂缝扩展形态，依据压裂改造体积大小及变化幅度对参数进行优选，最终确定出合理的混合水压裂设计参数。本发明能够较为精确反映储层非均质性，模拟的裂缝形态与实际地质条件差别较小，得到的压裂参数相比常规方法更为可靠，能够达到压裂预期。 The invention relates to a compact oil and gas reservoir mixed water fracturing parameter determination method, and belongs to the technical field of oil production engineering. According to the method, regional horizontal two-direction stress difference distribution is simulated and calculated by utilizing a comprehensive compressibility model and rock elastic mechanical parameters, a three-dimensional fracture model is adopted to analyze fracture propagation forms under fracturing parameters under a mixed water fracturing process, and the parameters are optimized according to the fracturing transformation volume and the change amplitude; and finally, reasonable mixed water fracturing design parameters are determined. According to the method, the anisotropism of the reservoir can be accurately reflec