产品展厅>>项目研发>>大规模压裂井试井解释方法研究

针对我国致密油气田开发普遍采用大规模体积压裂的现状,需要研究与之相对应的大规模体积压裂后试井资料解释分析方法,开发大规模压裂井数值试井解释软件。利用软件对压力恢复试井资料及动态生产数据进行解释,提供地层压力、渗透率、油水饱和度分布图;提供井储系数、表皮系数、裂缝半长等参数;提供压裂后有效流动控制体积;通过生产数据分析进行产能递减分析,并提供合理工作制度优化方案。

本项目通过大规模压裂后压裂液返排数据分析,综合考虑含水率、压力数据、产量数据,进行单井及多井干扰下的生产数据拟合方法研究,利用获得的地层数据进行产能评价方法研究。主要技术内容如下:

考虑启动压力梯度与应力敏感性的试井曲线特征研究:

建立考虑启动压力梯度与应力敏感性的地层渗流方程,同时开展致密油藏渗流方程的求解研究,相关算法是大规模压裂试井解释的根本。

低渗透试井及产能全历史模拟新技术:

提供低渗透测试,全历史模拟及拟合新技术,解决了勘探井资料利用率低问题。

形成用于压裂井网格产能评价计算方法,为大规模压裂试井解释提供计算工具。

基于组件的软件架构设计,制定统一的通讯协议和数据接口,使组件可以方便的复用。

我国页岩油气及致密油气勘探开发处于起步阶段,国内还没有致密油气试井解释分析软件。在产品中使用非结构网格生成的前沿追踪算法,细化油藏数值模拟中的局部网格划分;使用多井试井分析方法,反演地层中的地质参数分布。

Products>>Project Development>>Study on Well Testing Interpretation of Large Scale Fracturing Wells

In view of the fact that large-scale volume fracturing is widely used in the development of dense oil and gas fields in China, it is necessary to study the corresponding interpretation and analysis method of large-scale volume fracturing well testing data and develop the numerical well testing interpretation software. The pressure recovery well testing data and dynamic production data are interpreted by software, and the distribution charts of formation pressure, permeability, oil and water saturation are provided, well storage coefficient, skin factor, fracture half-length and other parameters are provided; effective flow control volume after fracturing is provided; productivity decline analysis is carried out through production data analysis, and reasonable working system optimization scheme is provided.

According to the data analysis of fracturing fluid back flow after large-scale fracturing, this project comprehensively considers the water content, pressure data and production data, and studies the production data simulation method under single well and multi-well interference, and makes use of the obtained formation data to study the productivity evaluation method. The main technical contents are as follows:

Study on the characteristics of well testing curves considering the start-up pressure gradient and the stress sensitivity:

Establishing a formation seepage equation considering the starting pressure gradient and the stress sensitivity, and simultaneously carrying out the solution study of the seepage equation of the dense oil reservoir, the correlation algorithm is the fundamental of large-scale fractured well testing interpretation.

Low-permeability test well and production capacity full-history simulation new technology:

The invention provides a low-permeability test, a full-history simulation and a simulation new technology, and solves the problem of low utilization rate of the data of the exploration well.

Forming a calculation method of fracturing well grid productivity evaluation, and providing a calculation tool for the interpretation of a large-scale fracturing well testing.

A unified communication protocol and data interface are developed based on the software architecture design of the component, so that the component can be easily reused.

The development of the shale oil and gas and the dense oil and gas exploration in China is in the initial stage, and the gas well testing interpretation software does not exist in China. Using the tracing algorithm generated by the non-structural grid in the product, the local grid division in the numerical simulation of the reservoir is refined, and the distribution of the geological parameters in the formation is inverted by using the multi-well testing well analysis method.