Southwest Petroleum University

Chengdu Leps Technology Co., Ltd

Zhengzhou University

Premier Kitchen Products

Cong Lu

Chi Chen

Jianchun Guo

Kun Wang

Zhihong Zhao

Ye Zhong

Shan Ren

Congbin Yin

Meiping Li

Shaobin Zhang

Su Diao

Jie Lai

Shouxin Wang

Chaojun Tang

Yunchuan Zheng

Bin Liu

Yong Ren

Zhifeng Luo

Bo Gou

Tao Zhang

Xianjun He

Yuxuan Liu

Jichuan Ren

Qingsong Guo

Qianli Lu

Hao Yang

Mingyuan Zhou

Liangchao Huang

Jianhua Liu

Yuhang Zhao

Zhengmeng Hou

Li Ma

Jiapeng Zhang

Bin Qian

Yingxian Ma

Xin Lei

Xinghao Gou

Yongjun Xiao

Xiang Bai

Lin Wu

Xuning Wu

Ming Dou

Guangyao Yang

Qianjun Chen

Junfeng Li

Huifei Mao

Mingzhong Chen

Xueshan Yang

Chuhao Huang

Junyao Ran

Fenglan Huang

Yang Luo

Jiyu Wang

A method for cyclic biochemical conversion of carbon dioxide and hot gas cogeneration in depleted oil and gas reservoirs includes: S1: selecting a target depleted oil and gas reservoir; S2: adjusting a temperature of the target depleted oil and gas reservoir to 30° C. to 70° C. and detecting whether formation water of the target depleted oil and gas reservoir contains methanogenic archaea, in which if no methanogenic archaeon is contained, then methanogenic archaea is injected and step S3 is proceeded, and if methanogenic archaea are contained, then step S3 is proceeded directly; S3: injecting a mixture of carbon dioxide and hydrogen into the target depleted oil and gas reservoir through a gas injection well; and S4: shutting down the gas injection well to wait for the methanogenic archaea to convert carbon dioxide and hydrogen into methane and exploiting the methane and heat energy in the target depleted oil and gas reservoir.

Method for cyclic biochemical conversion of carbon dioxide and hot gas cogeneration in depleted oil and gas reservoir

The present invention pertains to the field of oilfield stimulation technologies for oil and gas field development, in particular to an instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof, and the polyacrylamide is modified by adding rigid temperature and salt resistant monomer containing benzene ring and cationic fluorinated hydrophobic monomer on the basis of acrylamide monomer and sodium acrylate monomer, and then polymerized to obtain instant soluble temperature and salt resistant polyacrylamide. The temperature and salt resistant monomer containing benzene ring can improve the thermal stability and temperature and salt resistance of polyacrylamide, while the long-chain cationic fluorinated hydrophobic monomer can enhance the hydrophobicity of polymer. The comprehensive properties of polymer is improved by appropriate intermolecular association.

Instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof

The present invention discloses a novel high-temperature visual acid etching test device and method; the test device includes a visual rock slab holder, an acid solution storage tank I, an acid solution storage tank II, a heating apparatus, a high-pressure water pump, a low-pressure acid pump, a back-pressure valve, an acid valve A, an acid valve B, an acid valve C, an acid valve D, an acid valve E, an acid valve F, a water valve G, a water valve H, a water valve I, a water valve J, and a water valve K; both the acid solution storage tank I and the acid solution storage tank II are provided with a piston therein, where the acid solution storage tank is divided into upper and lower independent parts by the piston. According to the present invention, the flowing process of an acid solution in a fracture can be directly observed to accurately characterize the distribution of the acid solution in the fracture, which facilitates a study on an acid etching mechanism. According to the present invention, an acid solution injection system is separated from a water injection system, so that only water is injected into the system through a high-pressure pump, effectively solving safety problems of acid solution pumping. In the test process of the present invention, a totally-enclosed acid solution system can ensure that the acid solution does not overflow at high temperature and high pressure, thus greatly increasing the safety of the test.

High-temperature visual acid etching experimental device and method

A structural stabilizer for a fiber and proppant complex to enhance proppant migration and placement in a fractured well during propping and a preparation method thereof are provided. The structural stabilizer consists of: water, inorganic salt, kaolinite, nitrogen-doped modified graphene oxide, anionic surfactant, non-ionic alkyl polyglucoside, and polyacrylamide. The structural stabilizer improves bonding between a proppant and a fiber when slick water is used in stimulated reservoir volume (SRV) fracturing, prevents separation of the fiber and the proppant during migration, thereby reducing escape rate of the fiber from the fiber and proppant complex.

Structural stabilizer for fiber and conventional proppant complex in efficient proppant migration and placement technology of fractured well and preparation method

A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed.

Method for characterizing complexity of rock fracture based on fractal dimension and device thereof

Chopping device

Chopper

The invention discloses a method for experimentally determining the conductivity of an unpropped fracture in hydraulic fracturing of a shale reservoir, comprising: select an outcrop sample with a natural fracture in the shale reservoir, and cut the outcrop sample with along the extension direction of the natural fracture into no less than eight square rock slabs; use a laser scanner to obtain the rough topography data of the fracture surface of each square rock slab and calculate the area tortuosity; pick out the rock samples; model the rough surface of the selected rock samples; import the treated surface model into the engraving machine, and select the downhole core or outcrop rocks in the same horizon for repeated production; calculate the shear slippage at different positions of unpropped fracture according to the data of the shale reservoir; finally test the conductivity of the shale rock samples after shear slip.

Method for experimentally determining the conductivity of unpropped fracture in hydraulic fracturing of shale reservoir

A method for acquiring an opening timing of natural fracture under an in-slit temporary plugging condition and a device thereof are provided. The method includes steps of: acquiring physical parameters of stratum according to site geological data, and measuring a slit length L of a hydraulic fracture; dividing the hydraulic fracture into N unit bodies of equal length and numbering them sequentially; and dividing a total calculation time t into meter fractions of time with equal interval; calculating a width of each unit body in the hydraulic fracture at the initial time; calculating a fluid pressure in the hydraulic fracture at the k-th fraction of time; calculating a closed pressure at an entrance of the natural fracture on an upper side and a lower side of the hydraulic fracture at the k-th fraction of time; and determining whether the natural fracture is opened by a determining criteria based on the above calculation results.

Method for acquiring opening timing of natural fracture under in-slit temporary plugging condition

Combined juice extractor and slicer

Slicer

A multi-function salad preparation unit is provided, including a salad bowl having an upper rim and a mandoline slicer. The mandoline slicer fits on the upper rim of the salad bowl and includes a main platform along which food is to be slid, and a cutting tool disposable in the main platform, with a space adjacent the cutting edge of the tool. When food is slid across the main platform, the cutting edge removes a quantity of the food which falls through the space and into the salad bowl. The mandoline slicer preferably includes a first slot with the cutting tool insertable into the first slot substantially co-planar with an upper surface of the main platform. A second slot is also preferably provided, disposed below the upper surface, for cutting tool storage. Multiple interchangeable cutting tools, e.g., slicer(s), dicer(s), grater(s), are selectively disposable in the first and second slots.

Multi-function manual salad preparation unit

Growing community of inventors

Chengdu, China

Cong Lu