Yangtze University

Wuhan University

Jingzhou Modern Petroleum Technology Development Co. Ltd

Hui Zhao

Lei Zhang

Weichu Yu

Ying Zhang

Wenming Shu

Fei Ding

Wenjie Xia

Pingtian Fan

Liang Zhou

Huan Yang

Aibin Wu

Wei Xie

Dongkui Zhou

Lin Jiang

Shuaishuai Li

Zhenhu Lv

Xiaoyue Pan

Tixian Tian

Lisheng Ren

Jianglu Jing

Zhao Wang

Zhipeng Yu

Zhengdong Lei

Han Wang

Xumin Gao

Jianyang Zhu

Rui Li

Baocheng Wu

Chaoyi She

Shujian Xie

Yuhui Zhou

Hui Wang

Qingxiong Hu

Guanglong Sheng

Disclosed is a method for determining three-dimensional in-situ stress based on displacement measurement of borehole wall, including the following steps: pumping the prefluid and the sand-carrying fluid into the target interval, and injecting the biological oil displacement agent into the target interval in sequence; pumping temporary plugging agent into the target layer to implement crack plugging diverting; pumping the sand-carrying liquid into the target interval, and injecting the biological oil displacement agent into the target interval. The beneficial effect of the technical scheme proposed in this disclosure is: by injecting oil displacement agent to fracturing fluid, the temporary plugging diverting fracturing is integrated constructed with enhanced oil recovery, at the same time, it can overcome the incomplete removal of temporary plugging agent and the water lock effect of fracturing fluid caused by diverting fracturing.

Volumetric fracturing method of temporarily plugging and diverting through functional slick water with oil displacement agent injected simultaneously

An enhanced oil recovery method includes: screening out implementation well that meet the requirements of a preset standard; selecting the target interval that can be used for enhanced oil recovery in the implementation well; obtaining the reservoir parameters and perforation parameters of the target interval, so as to divide the target interval into several groups of swallowing and exhaling segments, injecting the infection liquid containing and simmer the well for a period of time; and after the well simmering, the oil-water mixture replaced by the injection fluid is produced from each exhaling segment.

Enhanced oil recovery method with single well huff and puff and inter-segment oil displacement after horizontal well fracturing

A rotary joint, including: a hydraulic follow-up mechanism and a rotary transmission mechanism. The hydraulic follow-up mechanism includes a cylinder body, a valve sleeve, a valve core, a valve body, a left end cover and a right end cover. The rotary transmission mechanism includes a tray, a stabilizing ring, a follow-up disk, a torque transfer disk and a stable supporting wheel mechanism. The left end cover and the right end cover are arranged at the left and right ends of the cylinder body, respectively. The valve body is concentrically mounted in a cylindrical hollow chamber of the cylinder body. The output shaft at the right end of the valve body projects out of the right end cover. The right end of the valve core is provided with a valve core torque transfer shaft extending rightwards through the right end of the valve body.

Passive follow-up hydraulic rotary joint

Growing community of inventors

Wuhan, China

Hui Zhao