产品展厅>>项目研发>>致密储层体积压裂边界影响及渗流特征研究

目前油田勘探目标和攻关对象主要是致密储层,对于此类储层,往往需要在长水平井中通过多级水力压裂进行储层改造、井网加密和其他措施以提高油气产量,实现高效经济开发。然而,水平井多段压裂改造是世界级难题,也是制约水平井在低渗储层应用的技术瓶颈,其关键技术在于:研究水平井油藏工程以解决水平井布井难题;研究就地应力场以解决水力裂缝起裂及形态问题;研究水平段分段压裂优化设计以解决多段裂缝设置问题;研究分段压裂工艺和工具以解决水平井分段压裂的实施问题;研究裂缝监测以解决多段裂缝评估问题。

国内外对常规压裂试井技术研究很多,试井方法较为完善,但是对致密多段压裂水平井试井技术研究还处于发展阶段,渗流特征认识还不够深入,还未形成成熟解释方法。因此研究开发致密储层试井分析方法成为目前试井应用方面需要解决的重要问题。 

大规模体积压裂数学模型建立及求解研究

水平井体积压裂改造区和原状地层渗流规律对试井模型影响

致密非达西渗流研究,分析启动压力梯度对流动的影响

数据反演确定地层参数方法研究及影响因素分析

注采渗流阻力研究数学模型及不同液量下压力-距离的公式,并进行特征曲线分析

利用不稳定试井资料进行产能分析预测计算模型及产能曲线

该项目对致密多段压裂水平井试井技术研究取得了突破,提出了致密试井分析方法,为页岩油体积压裂开发过程中的试井评价提供了技术保障。并且实现了模型建立-模型求解-生产应用的有效结合,解释提供了地层渗透率、井储常数、表皮系数、裂缝半长、启动压力等参数,现场应用效果良好。

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.