Results 141 to 150 of about 76,051 (383)
Geology of symmetric grounds [PDF]
arXiv, 2019 Let us say that a model of $\mathsf{ZF}$ is a symmetric ground if $V$ is a symmetric extension of the model. In this paper, we investigate set-theoretic geology of symmetric grounds. Under a certain assumption, we show that all symmetric grounds of $V$ are uniformly definable. We also show that if $\mathsf{AC}$ is forceable over $V$, then the symmetric
arxiv
Genesis and reservoir preservation mechanism of 10 000‐m ultradeep dolomite in Chinese craton basin
Deep Underground Science and Engineering, EarlyView.Potential exploration target stratum of 10 000‐m ultradeep dolomite in Sichuan Basin and Tarim Basin, China. Abstract The 10 000‐m ultradeep dolomite reservoir holds significant potential as a successor field for future oil and gas exploration in China's marine craton basin.
Guangyou Zhu +8 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.Fine modeling of a three‐dimensional fracture structure under dynamic loading of coal is carried out. The streamline distribution law of pressure and velocity field in the loading process of the coal specimen is analyzed, the absolute permeability of the coal specimen is calculated, and the feasibility of the pore network model algorithm and finite ...
Huazhe Jiao +6 more
wiley +1 more source
Geologic and Engineering Parameters Used in Stimulating Tight Gas-Bearing Sandstones by Modified Hydraulic Fracturing Techniques: North Douglas Creek Arch Field, Colorado: ABSTRACT [PDF]
, 1984 U. Ahmed M. Holland
openalex +1 more source
Deep Underground Science and Engineering, EarlyView.A novel analytical method is proposed to evaluate the shear stress effect on the progressive compressive failure and microcrack growth direction in brittle rocks. The shear stress effect on the wing crack growth direction during the progressive compressive failure is determined. The initial crack angle effect on the y‐direction peak stress and the wing
Xiaozhao Li +6 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.A series of water infiltration tests and gas permeability tests were conducted on granite and granite–bentonite samples. According to the results, the interfaces between granite and bentonite and the damaged granite were considered to be the preferentcial pathway for gas migration.
Jiangfeng Liu +5 more
wiley +1 more source
Simple methods for assessing groundwater resources in low permeability areas of Africa [PDF]
, 2001 In many areas throughout Africa, a staggering proportion of wells and boreholes fail. Failure can occur for a number of reasons – inadequate maintenance and community involvement, poor engineering or a lack of water. Often it can be difficult to work
Davies, J. +2 more
core
Progress and development of volume stimulation techniques
Petroleum Exploration and Development, 2018 Based on the theoretical study and field application of volume stimulation in horizontal wells over the past 10 years, the core connotation of volume stimulation was further interpreted.
Yun XU +7 more
doaj
Field experiments and main understanding of shale oil hydraulic fracturing
Frontiers in Earth ScienceTo understand the key processes of hydraulic fracturing in shale oil reservoirs, such as artificial fracture initiation and extension, proppant transportation and settlement, and the influencing factors of post-fracture production, many hydraulic ...
Mengyun Zhao, Mengyun Zhao, Mengyun Zhao
doaj +1 more source
Parallel Geothermal Numerical Model with Fractures and Multi-Branch Wells
ESAIM: Proceedings and Surveys, 2018 To answer the need for an efficient and robust geothermal simulation tool going beyond existing code capabilities in terms of geological and physical complexity, we have started to develop a parallel geothermal simulator based on unstructured meshes. The
Beaude Laurence +7 more
doaj +1 more source