裂缝—孔隙型双重介质应力敏感模拟试验研究

STUDY ON THE STRESS SENSITIVITY OF PERMEABILITY IN FRACTURE-PORE DUAL MEDIA BY THE FULL SIMULATION EXPERIMENT

向阳 向丹 黄大志

XIANG Yang XIANG Dan HUANG Da-zhi

成都理工大学, 油气藏地质及开发工程国家重点实验室, 四川, 成都, 610059

Study Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

在上覆压力75MPa、地层温度120℃、地层压力30MPa和水饱和度下的全直径全模拟降压开采试验揭示了裂缝—孔隙型双重介质由于生产压差的增大所导致有效上覆压力的增加而使裂缝高度减小所造成的地层气相渗透率的损害规律:渗透率越高,渗透率的损害越大。在此基础上,作者提出了不同类型储层的临界生产压差。

The holodiameter full-simulation blow-down exploitation experiment was done under the conditions of 75MPa of overburden pressure, 120℃ of formation temperature, 30MPa of formation pressure and water saturability.The results revealed that in fracture-pore dual media, the increase of production pressure drop resulted in the increase of effective overburden pressure and the decrease of fracture height, which caused the demage of gas permeability in reservoirs.It was showed that the higher the permeability was, the greater the damage of permeability was.On this basis, the critical production pressure drops for different types of reservoirs were suggested.

国家重点实验室基金(PLC9916)

https://doi.org/10.11781/sysydz200305498