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产品展厅>>项目研发>>辽河油田提捞试井资料解释及工作制度研究

对于开发井,由于生产时间很长,已无法得到原始的状态,因此测试时第一段应该是压力恢复,通过第一段的压力恢复可以大致反推第一段关井前的压降漏斗,依据这一压降漏斗计算压力历史。在提捞井压力史计算中,由于提捞时间与恢复时间相比很小,在井筒压力计算中忽略提捞时间,而认为压力瞬间改变,即压力在提捞期间是阶梯变化,而停产期间压力变化按DST流动处理,可以自动计算回收量。对于间抽采油由于存在地层流入到井筒的量与从井筒抽出的量不相等,所以需要输入流动达到稳定时的流量,同时也要确定稳定流动时间。

我公司根据间抽及提捞采油的特点,建立了间歇采油和提捞井的数学模型,提出了全压力历史拟合的试井分析方法。 

本项目研发提捞试井分析和生产优化预测软件,主要技术内容包括:

建立提捞试井物理模型及数学模型。

完成提捞试井数学方程求解方法及试井图版绘制。

建立提捞试井资料解释方法及生产制度优化方法。

进行现场井的资料解释及制度优化,提供地层原始压力及平均压力,利用试井解释结果进行生产制度优化,并预测压力及产量。

本项目形成软件后可根据现场数据进行分析,并通过生产优化预测未来产量。通过在辽河油田的现场应用,不仅得到了解释结果,而且根据解释结果优化了间抽及提捞采油的工作制度,具有很强的技术优势。 

Products>>Project Development>>Study on the influence of volume fracturing boundary and seepage characteristics of dense reservoir

At present, the exploration targets and key research objects of the oilfield are mainly dense reservoirs. For such reservoirs, it is often necessary to carry out reservoir reconstruction, well pattern infilling and other measures through multi-stage hydraulic fracturing in long horizontal wells to improve oil and gas production and realize efficient and economic development. However, multi-stage fracturing of horizontal wells is a world-class problem and a technical bottleneck restricting the application of horizontal wells in low-permeability reservoirs. The key technologies are: studying horizontal well reservoir engineering to solve the problem of horizontal well layout; Study the in-situ stress field to solve the problems of hydraulic fracture initiation and shape; Study the optimal design of staged fracturing in horizontal section to solve the problem of multi-stage fracture setting; Study the staged fracturing technology and tools to solve the implementation problem of staged fracturing in horizontal wells; Crack monitoring is studied to solve the problem of multi-stage crack evaluation.

Establishment and solution of mathematical model for large-scale  volume fracturing

Influence of seepage law in volume fracturing zone and undisturbed formation of horizontal well on well test model

Study on dense non-Darcy seepage: The influence of start-up  pressure gradient on flow is analyzed

Study on the method of determining formation parameters by data  inversion and analysis of influencing factors

The mathematical model of injection and production seepage resistance and the formula of pressure-distance under different liquid volume are studied,  and the characteristic curve is analyzed

Productivity analysis and prediction calculation model and productivity curve using unstable well test data

The project has made a breakthrough in the research of tight multi-stage fracturing horizontal well test technology, and proposed a tight well test analysis method, which provides a technical guarantee for well test evaluation in the process of shale oil volume fracturing development. The effective combination of model establishment, model solution and production application is realized. The interpretation provides parameters such as formation permeability, well storage constant, skin coefficient, fracture half-length and start-up pressure. The field application effect is good.

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