产品展厅>>研发&服务>>侏罗系页岩油压后试油资料解释评价技术服务

四川盆地侏罗系页岩在凉高山组,以及自流井组大安寨、东岳庙等段广泛发育,资源量石油26.75亿吨、天然气1.72万亿方,试油5口井均获工业油气流,勘探前景广阔。四川盆地侏罗系页岩储层类型多样,压力系数高,油气水多相复杂流动。现在川渝页岩油仍采用大庆深层致密气不闷井油水置换、频繁切换或者过大油嘴排采,瞬时产量显著提升,但后期稳产性差。目前没有开展针对气水变化规律和压降裂缝参数变化基础上的不同返排阶段的排采制度的研究,另外放喷初期压力过高裂缝处于开启状态,过大油嘴可能造成支撑剂回流,目前没有开展页岩油储层的适应性研究。所以亟需形成适应川渝侏罗系页岩储层压后排采测试制度,提高单井排采效率与累产效果,支撑四川盆地侏罗系页岩油气勘探试油生产。

针对川渝页岩油储层,通过统计分析油气水变化规律和裂缝参数变化评价研究,建立不同返排阶段的合理排采制度和评价方法,科学指导试油生产。

研究内容包括侏罗系页岩油压后高频压力检测与停泵分析、侏罗系页岩油不同返排阶段试油资料试井解释评价,并出具分析解释及形成一种川渝侏罗系页岩储层压后返排制度规范方法报告。

1、侏罗系页岩油压后高频压力监测与停泵分析:完成压裂资料检测与分析,曲线符合率80%。

2、侏罗系页岩油不同返排阶段试油资料试井解释评价。

完成侏罗系页岩油井压后返排资料解释,有效指导压后排液求产方案制定,形成一种川渝侏罗系页岩储层压后返排制度规范方法。

压裂返排是在页岩气、致密气等非常规油气开采中使用的压裂液回流的方法。通过压裂液在注入地下岩层中产生压力,破裂岩石形成裂缝以释放油气。本项目提供侏罗系页岩油压后高频压力监测与停泵分析、侏罗系页岩油不同返排阶段试油资料试井解释评价,并出具分析解释及形成一种川渝侏罗系页岩储层压后返排制度规范方法。能够有效指导压后排液求产方案制定,形成一种川渝侏罗系页岩储层压后返排制度规范方法。纵观国内外页岩勘探开发经验,全生命周期裂缝参变化评价和油气水变化规律研究是压后排采测试制度的基础,所以本项目完成的压后合理返排和生产制度优化是保障压裂效果和稳产的关键,具有很强的应用空间。

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.