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产品展厅>>产品销售>>辰工试井系列软件>>页岩气、煤层气试井分析

对煤层气及页岩气的试井分析是在原试井软件的基础上增加压敏效应、吸附效应。考虑到页岩气水平井多段压裂的计算复杂性,本软件采用GPU进行计算,提高计算速度。

提供6种考虑压敏的计算模型:Palmer-Mansoori的压敏模型;Seldle-Suitt的压敏模型;指数式模型;对数式模型;修正的Palmer-Mansoori的压敏模型;直接的实验数据。

采用Langmuir假设考虑了吸附及解吸附。

地层气体扩散采用Fick扩散方程。

对于气体的高速渗流,采用湍流因子修正达西定律。

采用真实气体的状态方程分析煤层气体试井。

煤层气提供DST试井的联合分析方法。

煤层气提供注入压降的试井分析,如果压破煤层提供G函数等分析方法。

对于页岩气除了考虑压敏、吸附、扩散及高速非达西渗流外(与煤层气相同),还提供以下模型:

提供均匀流量、无限传导及有限传导的三种形式水平井多段压裂模型。

提供不等长及等距的水平井多段压裂模型。

提供沿水平井方向压裂的多条裂缝模型。

图1 多段压裂井底压力双对数图 图2 压力及导数拟合图

Products>>Products on Sale>>Chengong Well Testing Software Series>>Well Testing Analysis of Shale Gas and Coalbed  Gas

The well testing analysis of coalbed gas and shale gas is to add the pressure sensitive effect and adsorption effect on the basis of the original well testing software. Considering the calculation complexity of multi-stage fracturing of shale gas horizontal well, the software uses GPU to calculate and improves the calculation speed.

Six calculation models considering pressure sensitive are provided: Palmer-Mansoori pressure sensitive model, Seldle-Suitt pressure sensitive model, exponential model, logarithmic model, modified Palmer-Mansoori pressure sensitive model and direct experimental data.

Langmuir hypothesis was used to consider adsorption and  desorption.

Fick diffusion equation is used for formation gas diffusion.

For the high speed seepage of gas, the Darcy law is modified by turbulence factor.

The state equation of real gas is used to analyze coalbed gas well testing.

Software provides a joint analysis method for DST well testing to   coalbed gas.

Software provides well testing analysis of injection pressure drop, such as broken coalbed formation provides G function and other analysis methods to coalbed gas.

For shale gas, in addition to considering pressure sensitivity,  adsorption, diffusion and high speed non-Darcy seepage (the same as coalbed gas), the following models are provided:

Three kinds of horizontal well multi-fracturing models with uniform flow rate, infinite conduction and finite conduction  are provided.

Providing multi-stage fracturing model of horizontal well with unequal length and equal distance.

To provide multiple fracture models for fracturing along horizontal wells.

Figure1: Double logarithmic chart of bottom hole pressure in multi-stage fracturing Figure2: Pressure and derivative simulation chart