[LUN, Zengmin 伦增珉, SUN, Huanquan 孙焕泉, WANG, Guangfu 王光付, HU, Bo 胡渤, TANG, Lei 唐磊, YANG, Yuanliang 杨元亮, WANG, Jianyong 王建勇, LV, Chengyuan 吕成远, SUN, Jianfang 孙建芳, WANG, Haitao 王海涛, JIANG, Yanbo 姜颜波, MA, Tao 马涛] No.22 Chaoyangmen North Street, Chaoyang District 中国北京市朝阳区朝阳门北大街22号, Beijing 100728Beijing 100728;No.31 Xueyuan Road, Haidian District 中国北京市海淀区学院路31号, Beijing 100083Beijing 100083 A thermal recovery construction method, comprising: determining a design parameter of the current thermal recovery construction according to geological data and oil reservoir feature data of an oil reservoir area to be modified; preparing, according to the design parameter, coal water slurry required in the current thermal recovery construction; injecting the coal water slurry into a destination reservoir by means of an injection well and according to an injection means in the design parameter, and injecting comburent according to a total injection amount of the coal water slurry; and triggering spontaneous combustion of the coal water slurry by using heat generated by a downhole heating apparatus, and performing displacement regulation on the oil reservoir by using heat energy and gas which are generated after combustion. The method is helpful for clean utilization of coal, reduces the cost of thermal recovery, improves the crude oil recovery and development efficiency, and gives full play to the role of a combustion product.

[WANG, Haitao 王海涛, SUN, Huanquan 孙焕泉, HE, Yingfu 何应付, LUO, Ming 骆铭, LUN, Zengmin 伦增珉] {No.22 Chaoyangmen North Street, Chaoyang District 中国北京市朝阳区朝阳门北大街22号, Beijing 100728Beijing 100728;CN CN(CN)(CN)}{No.31 Xueyuan Road, Haidian District 中国北京市海淀区学院路31号, Beijing 100083Beijing 100083;CN CN(CN)(CN)} Disclosed in the present invention are an asynchronous cycle-based oil extraction apparatus, method and system. The apparatus comprises at least one well group and a control unit; each well group comprises a shaft and at least one horizontal well group; each horizontal well group at least comprises a first well and a second well; the shaft is perpendicular to the ground; the well groups share one shaft; the first well and the second well are both horizontal wells parallel to the ground; a sleeve, an oil pipe and a packer are provided in the shaft; and the control unit is used for performing the following steps on the well group: injecting a gas into the first well by means of the sleeve, and soaking the second well; continuously injecting the gas into the first well so that crude oil displaces to the second well, and performing production in the second well by means of the oil pipe; soaking the first well and the second well, such that the gas enters a low-permeability area; and continuously soaking the first well, and performing production in the second well by means of the oil pipe. The present invention improves the oil extraction efficiency of a heterogeneous oil reservoir having a crack or a high-permeability strip.