Southwest Petroleum University

Yulong Zhao

Ruihan Zhang

Liehui Zhang

Shuyong Hu

Nana Song

Xueqiang Guo

Jian Zheng

Tingting Qiu

Xindong Wang

Huiying Tang

Qian Li

Tao Zhang

Fei Zhang

Bingyang Zheng

Xian Peng

Bo Hu

Chaowen Wang

Suyang Zhu

Xiaolong Peng

Peng Deng

Feng Ge

Chunsheng Jia

Jianfa Wu

Zihan Zhao

Tao Long

Yongchao Wang

Xiaobing Han

Hongsha Xiao

Deliang Zhang

Xinyuan Long

Qunchao Ding

Hongxi Li

Disclosed are a device and method for determining gas diffusion coefficient in rocks. The device includes: a core holder, a sampling mechanism, a gas analyzer, a gas source and a pressure gauge. A middle part of the core holder holds a rock sample, two sampling mechanisms are symmetrically arranged at two ends of the rock sample, each sampling mechanism includes a first blind tube, a cylinder, a second blind tube and a sampling cavity, an open end of the first blind tube faces the rock sample and is in sealing connection with an end surface of the rock sample to form a diffusion chamber. A single sampling cavity is isolated from the diffusion chamber, and the pressure of the diffusion chamber is not affected, so that undisturbed sampling is achieved, the influence on the pressure of the diffusion chamber is reduced, and the accuracy of the determination results is improved.

Device and method for determining gas diffusion coefficient in rocks

An apparatus for evaluating a dried crystal error in a COdrying experiment comprises a heating jacket, a visual container, a weighing device, a transparent cover, a control apparatus, a vacuum pump, a damping table and a heating apparatus, and can accurately dry and weigh a rock sample subjected to a carbon dioxide drying effect experiment in the visual container, so that the crystal error caused by evaporation of a solution in the rock sample in the process is calculated. This apparatus provided by the present invention has high precision and simple operation, can well evaluate the crystal error caused by the saline solution retaining in the rock sample when the rock sample is directly dried in the carbon dioxide drying effect experiment, and can correct the results of the carbon dioxide drying effect experiment compared with the prior art, thereby obtaining accurate experiment results.

Apparatus for evaluating dried crystal error in COdrying experiment and use method thereof

An experimental simulation device for hydrogen production by in-situ conversion of a gas reservoir comprises a gas source, a plurality of groups of reactors and an analysis monitoring device, wherein the gas source comprises a methane tank, a helium tank, an oxygen tank and a water vapor generator, the gas source can supply gas to the reactors separately, the in-situ hydrogen production is simulated in the reactors; and meanwhile, a use method of the experimental simulation device for hydrogen production by in-situ conversion of the gas reservoir can achieve accurate simulation of the multi-stage in-situ hydrogen production and multi-well group cooperative hydrogen production processes of different types of gas reservoirs in actual production by adjusting connection states of the plurality of groups of reactors. The experimental result in the present invention can be closer to the actual production.

Experimental simulation device for hydrogen production by in-situ conversion of gas reservoir and use method thereof

The invention discloses a natural gas diffusion coefficient measurement auxiliary device based on a hand-operated lifting device, comprising a core chamber, a bracket, a core preservation device, and a hand-operated lifting device; the left side of the core chamber is connected with a methane measuring chamber, and the right side of the core chamber is connected with a nitrogen measuring chamber; a rotatable bracket is installed on the lower left side of the core chamber, and the lower right side of the core chamber is connected with the hand-operated lifting device; the core chamber is rotated by the hand-operated lifting device with the support as the center; a horizontal platform at the lower part of the core chamber is provided with a revolving door that can accommodate the left end of the core chamber; a core preservation device is installed at the lower part of the revolving door. The invention has a simple structure, which greatly reduces the time required to load the core during natural gas diffusion coefficient measurement, and can effectively prevent the core from breaking and the rubber sleeve from being damaged.

Natural gas diffusion coefficient measurement auxiliary device of hand-operated lifting device

The invention discloses a full wellbore pressure calculation method, device and computer-readable storage medium for fracturing horizontal wells, includes steps: collect basic parameters, establish fully implicit numerical model of formation flow; solve the full implicit numerical model under an inner boundary condition of a constant gas production rate; calculate wellbore pressure change of each fracturing section of horizontal well; calculate the bottom-hole pressure of each fracture initiation point; repeat steps until the variables converge, the bottom-hole flow pressure and the bottom-hole pressure at each fracture initiation point are obtained at this time step; the wellbore pressure and wellhead casing pressure are calculated at this time step. The method is for predicting the variation law of full wellbore pressure and wellhead casing pressure by using production data in the absence of bottom-hole pressure test data, and has practical value for accurate prediction of production performance of gas reservoir fracturing horizontal wells.

Full wellbore pressure calculation method, device and computer readable storage medium for fracturing horizontal well

An experimental device for carbon dioxide imbition, diffusion and oil discharge in a tight oil reservoir includes: a multistage rock core holder connected with a confining pressure pump and including a pair of connecting holes arranged at an upper end and a lower end thereof with an oil filler pipe connecting therebetween, a crude oil injection device and a recovery device respectively connected to the upper and lower ends, an intermediate container connected to both a high-pressure cylinder and an injection pump, a return pressure pump, a collection device and a control system. A plurality of rows of openings is arranged at a side of the multistage rock core holder to act as a gas inlet connected with the intermediate container via a pipeline, and a gas outlet connected with the recovery device; heating layers are arranged at inner walls of the multistage rock core holder and the intermediate container.

Experimental device for carbon dioxide imbition, diffusion and oil discharge in tight oil reservoir

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Chengdu, China

Yulong Zhao