Chengdu University of Technology

Southwest Petroleum University

Huawei Technologies Co., Limited

Chengdu Greatech Electronic Technology Co., Ltd.

Nuclear Power Institute of China

Bin Yang

Hao Kai Zhang

Yang Yang

Jiping She

Ying Zhong

Chuan Liu

Yang Li

Bo Yang

Chao Jiang

Jianjun Ni

Jing Zhang

Ye Zou

Min Ren

Chong Lin

Yili Kang

Yu Liu

Chengyuan Xu

Jingyi Zhang

Lijun You

Shiyu Zhang

Wenjing Ma

Gege Teng

Chao Dai

Xiaopeng Yan

Wei Jiang

Yi Li Kang

Xiang Zhang

Li Jun You

Hexiang Zhou

Xiao Peng Yan

He Xiang Zhou

Cheng Yuan Xu

Cheng Lu

Fei Yang

Yufan Guo

Guanchang Pan

Yin Zhong

Di Yang

Kun Chang

Yue Li

Xinyang Wang

Yang Zhao

Mingxing Liu

Quan Ma

Yanqun Wu

Heng Wang

Daqi Chen

A method and system for detecting a leakage target by integrating temporal information. The method comprises: acquiring multiple frames of images of a target position, and arranging the multiple frames of images based on temporal information corresponding to the multiple frames of images to obtain a target image sequence; merging, in a channel dimension, the multiple frames of images in the target image sequence to obtain a multi-dimensional tensor; performing convolution processing on the multi-dimensional tensor to obtain a first output result, wherein the first output result is used for representing a frame difference between every two adjacent ones of the multiple frames of images; calculating an accumulated frame difference corresponding to the multiple frames of images based on the first output result; and inputting the accumulated frame difference to a trained target detection model as input data to obtain a second output result integrated with the temporal information.

Method and device for detecting leakage target by integrating temporal information

An automatically-cleanable thickening performance evaluation instrument for drilling LCMs includes a cleaning device, a kettle body, a thickening motor, a heating component, a test ending component, a top cover, and a bottom cover, where upper and lower ends of the kettle body are both opened; the kettle body is arranged in a third bearing inner race, a third bearing outer race is connected to a first limb, and the first limb is configured to limit a position of the kettle body; and the kettle body is detachably connected to the thickening motor and driven by the thickening motor to rotate. The instrument can realize electric heating and air pressurization to simulate the underground environment, and the kettle body can be completely sealed, such that a measured thickening time is close to an actual thickening time. Moreover, the instrument can be automatically cleaned at the end of a test.

Automatically-cleanable thickening performance evaluation instrument for drilling lost circulation materials

The invention provides a suspension modifier directly added into fracturing fluid for real-time proppant modification during fracturing and the application thereof, relating to the field of oil and gas production technologies. The suspension modifier is a controlled release nanoemulsion and comprises surface hydrophobic modifier, surfactant, cosurfactant and water. The suspension modifier is directly added into clear-water or active-water fracturing fluid while the proppant is added into water. After stirring, the suspension modifier is capable of self-assembling and being adsorbed on the proppant surface, so that the proppant surface becomes hydrophobic and aerophilic. The invention no longer requires the proppant to be pretreated, and the bubble-suspended proppant can be obtained directly by adding the suspension modifier to the clear-water or active-water fracturing fluid, and meanwhile adding the proppant to the fracturing fluid. This technology is not only easy to operate, but also low in cost for proppant treatment.

Suspension modifier directly added into fracturing fluid for real-time proppant modification during fracturing and the application thereof

A dynamic damage evaluation instrument of drilling fluid based on a glass core includes a controller and a support. A kettle body is provided on the support, a well for receiving drilling fluid is provided inside the kettle body, and a well cover is provided at an upper end of the kettle body. A core holding assembly communicating with the well is provided at a side of the kettle body, and a metering assembly is movably provided at the other end of the core holding assembly. A stirrer for stirring drilling fluid is provided inside the well, and a power component for driving the stirrer is provided outside the kettle body. A data detection hole for mounting a temperature and pressure sensor and a pressurization hole for mounting a pressurization device are formed on the well cover.

Dynamic damage evaluation instrument of drilling fluid based on glass core

The present invention discloses a method for proppant suspension and suspension parameter optimization based on bubble bridge effect, comprising: select a proppant and hydrophobically modify its surface to obtain a hydrophobically surface-modified proppant; prepare a bubbly fracturing base fluid; make the first optimization of the base fluids according to the average radius of the proppant and the average radius of the bubbles of the base fluids; optimally select the base fluids selected for the second time according to the interaction energy between the proppant particle and the bubble after the hydrophobically surface-modified proppant mixed with the base fluid; the basic parameters of the bubbly fracturing base fluid selected at the third time were used for the perfect selection for proppant suspension. The present invention establishes a procedure on experimental evaluation and parameter calculation optimization by suspending fracturing proppant with the bubble bridge effect on the hydrophobic surface.

Method for proppant suspension and suspension parameter optimization based on bubble bridge effect

A quantitative scoring and optimization method of a drilling and completion loss-control material includes: extracting key performance parameters of drilling and completion loss-control materials in loss-circulation zone, sequencing the key performance parameters according to their importance; performing weight calculation on the key performance parameters of the loss-control material by an analytic hierarchy process; determining scores of the key performance parameters of conventional loss-control materials according to an experimental evaluation table of the performance parameters of the loss-control materials; calculating comprehensive scores of all loss-control materials and performing optimal selection on the loss-control materials according to the comprehensive scores. The present disclosure provides a quantitative evaluation table of performance parameters of the loss-control materials, and an optimal selection method of the loss-control materials for different loss-control formations according to the analytic hierarchy process.

Quantitative scoring and optimization method of drilling and completion loss-control material

The invention discloses an experimental test method for subcritical propagation rate of rock fractures based on triaxial stress-strain curve, including: Step 1: preparing test sample core for experiment; Step 2: putting core into triaxial rock mechanics test system, applying constant radial confining pressure to core, and applying axial stress in the axial direction until the core is macroscopically damaged; recording experimental parameters of axial stress, strain and corresponding loading time of the core; Step 3: drawing stress-strain curve of the test core according to detection data points of axial stress and axial strain; Step 4: in the stress-strain curve of the test core, starting time and ending time of the subcritical propagation stage of fractures inside the core correspond to the initiation stress &#x3c3;ci and damage stress &#x3c3;cd, respectively, and calculating subcritical propagation rate of the subcritical fracture propagation stage of the test core.

Experimental test method for subcritical propagation rate of rock fractures based on triaxial stress&#x2014;strain curve

A cross-scale wide-spectrum particle size plugging formula granularity analysis method includes: performing a size classification on a plugging material of a plugging formula; obtaining a particle size distribution of the plugging material by performing procession on each particle plugging material via a laser granularity analysis method and an imaging granularity analysis method, according to difference sizes thereof; obtaining the particle size distribution of the plugging formula by a weighted summation way, according to a granularity interval and an addition of each particle plugging material. The present disclosure can solve a problem that the particle size distribution of the plugging formula across multiple-scale ranges can't be effectively obtained, and perform granularity analysis on wide-spectrum particle size plugging formula spanning a micron-grade size, a millimeter-grade size, a centimeter-grade size and above, so as to effectively evaluate sealing ability of the plugging formula and provide reference for researchers to optimize the plugging formula.

Cross-scale wide-spectrum particle size plugging formula granularity analysis method

A data processing method and apparatus, and a shared storage device, where the method includes receiving, by a shared storage device, a copy-on-write request sent by another storage device, where the copy-on-write request includes data on which copy-on-write is to be performed and a logical unit identifier and snapshot time point of the data; storing the data; and searching, according to the logical unit identifier and snapshot time point of the data, a preset shared mapping table for a corresponding entry, and storing, in the corresponding entry, mapping entry information of the data, where the mapping entry information includes the logical unit identifier and snapshot time point of the data and a storage address that is of the data and in the shared storage device, which can improve efficiency of snapshot data processing.

Data processing method and apparatus, and shared storage device

Growing community of inventors

Chengdu, China

Bin Yang