水力裂缝模型及计算机自动识别技术

MODEL AUTOMATIC!IDENTIFICATION TECHNOLOGY OF HYDRAULIC FRACTURE

王正茂 李治平 雷婉 李允

Wang Zhengmao Li Zhiping Lei wan Li yun

西南石油学院, 四川南充 637001

Southwest Petroleum Institute

常规压裂井试井分析中所用数据主要是停泵后的压降数据,而岩石发生破裂到停泵前这段压裂施工压力数据则没有得到有效利用,在压裂施工中也不能对裂缝的延伸状况进行动态监测。为此提出了水力裂缝模型的计算机自动识别技术,该技术可对岩石发生破裂到停泵前这段压裂施工压力数据进行准确分析。编制的压裂施工压力分析软件,可自动确定裂缝模型,并可求出裂缝长度、宽度等动态参数。这样在压裂施工中就可知道裂缝随施工时间发育、发展和闭合的情况,对正确指导压裂施工作业及获得优质裂缝具有十分重要的意义。

Declining pressure data are mainly used in the common fracturing well test analysis.However,the data,from rocks to be fractured to pumps to be stopped,are not utilized effectively.At the same time,in the process of fracturing construction,extended fractures are not monitored dynamically either.The technology of model automatic identification of hydraulic fracture proposed can accurately analyze fracturing construction pressure data from rocks to be fractured to pumps to be stopped.Using the analytical software of fracturing construction pressure can confirm automatically fracture model and calculate fracture dynamic parameters,such as the length,the width of fracture and so on.On the basis of that,in the fracturing construction,we can know timely growth,development and close of fracture.It is very significant to correctly direct fracturing construction and obtain fracture with high quality.

10.3969/j.issn.1000-7393.2003.04.016