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低渗油田开发方案的优化及措施参数的优选，与地应力有着密切的关系。文中着重阐述了3种确定地层应力方位的方法，它们是井壁崩落椭圆法、微地震法、波速各向异性及古地磁偏角法；介绍了凯塞效应法及压裂施工曲线法两种应力大小的测量方法。用上述方法测量并计算中原油田200多口井的地层应力状态，发现不论是应力方向还是大小都是有规律的。将这一规律应用于油田开发中，在实施压裂措施及制定注采井网时考虑地应力的分布状态，将延长无水采油期和提高最终采收率，使油田开发取得较好的经济效益。
Optimization of low-permeability oilfield development plan and the optimization of measures parameters are closely related to the in-situ stress. In this paper, three kinds of methods to determine the stress of formation are emphatically described, which are the wall cavern ellipse method, the microseismic method, the wave velocity anisotropy and the paleomagnetic declination method. The Kaiser effect method and fracturing construction curve method are introduced Measurement of the size of the stress. Using the above method to measure and calculate the stratum stress state of more than 200 wells in Zhongyuan Oilfield, we found that both the stress direction and the size are regular. Applying this law to the development of oilfields, considering the distribution of geostress in the implementation of fracturing measures and the development of injection and production wellbores, it will extend the period of anhydrous oil recovery and increase the ultimate recovery so as to achieve a better economy in oilfield development benefit.