杭锦旗区块压裂缝高影响因素及延伸规律分析

Influential factors and propagation laws of hydraulic fracture height in the Hangjinqi Block

朱新春

ZHU Xinchun

中石化华北油气分公司石油工程技术研究院

Petroleum Engineering Technology Research Institute, SINOPEC North China Oil and Gas Company, Zhengzhou 450006, He’nan, China

杭锦旗区块纵向发育多套砂岩气层，隔层较为发育，个别井底部发育水层，要求控制压裂裂缝高度。通过偶极声波测井资料分析，得到了杭锦旗区块横波时差计算公式，在此基础上建立单井岩石力学及地应力剖面。利用正交试验设计方法分析了影响裂缝高度的地质因素及工程因素。通过对缝高监测结果进行分析，明确了缝高延伸规律并建立控缝高压裂技术图版，在此基础上形成了控缝高压裂设计方法。通过现场应用，实现了控制裂缝高度，达到了避免压穿隔层沟通底部水层的目的。

In the Hangjinqi Block, many sets of sandstone gas layers are vertically developed with relatively developed barriers and water layers are developed at the bottoms of several wells, so it is necessary to control the height of hydraulic fracture. The formula for calculating the S-wave time difference of Hangjinqi Block was established by analyzing dipole acoustic log data. Then, single-well rock mechanic and ground stress profiles were established. The geological and engineering factors influencing fracture height were analyzed by means of the orthogonal experiment design method. By analyzing the fracture height monitoring results, the propagation laws of fracture height were defined and the chart of the fracture height control based fracturing technology was established. Based on this, the method for designing the fracture height control based fracturing was developed. When it is applied on site, fracture height is under control and the target of avoiding penetrating the barriers to connect the water layers at the bottom is reached.

10.13639/j.odpt.2020.01.017