Results 41 to 50 of about 96,612 (290)

Experimental study on initiation and propagation of hydraulic fractures in stratified shale oil reservoirs

Journal of Petroleum Exploration and Production Technology
The bedding planes of the Gulong shale oil reservoir in Daqing, China are extremely developed, which causes the hydraulic fractures to extend excessively in the horizontal direction while their longitudinal propagation is limited. In order to improve the
Hao Qin, Wuhao Guo, Haibo Zhao, Yintong Guo, Chuangang Xiang, Jianliang Zhang, Shujun Yin, Weilin Yan, Chuang Li, Yongguang Liang, Huabing Zhang, Xinao Zhang   +11 more
doaj   +1 more source

Adsorption and Desorption of Molybdenum on Rock and Soil Media

He huaxue yu fangshe huaxue
The release of radioactive 99Mo into the environment may lead to adverse effects on radiation safety and environmental security. Studying the migration behavior of molybdenum in environmental media is of great importance for the healthy development of ...
Pengliang LIANG, Tian XIE, Chao CHEN, Song YANG, Ruiqing WANG, Ying HAO, Jun ZHU, Bing LIAN   +7 more
doaj   +1 more source

Occurrence of biogenic steranes and penta- cyclic triterpanes in an eocene shale /60 million years/ and in an early pre-cambrian shale /2.7 billion years Preliminary report [PDF]

, 1965
Occurrence of biogenic steranes and cyclic triterpanes in very old, carbonaceous sediment rock formations - Green River shale, and Soudan shale fragmentation ...
Calvin, M., Burlingame, A. L., Belsky, T., Haug, P.   +3 more
core   +3 more sources

Synergistic Physicochemical Inhibition of Reactive Shale Formations Using Hydrothermally Synthesized Hydroxyapatite Nickel Tungstate Nanocomposites in Water‐Based Drilling Fluids

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Wellbore instability driven by the volumetric expansion of reactive shale formations remains a primary operational challenge in modern drilling engineering, causing severe mechanical failures and substantial economic deficits. The objective of this study is to formulate and evaluate a novel dual‐action chemical additive capable of ...
Ghaleb Oriquat, Basim Abdul Alrhym, A. C. Umamaheshwer Rao, Shivam P. Chaudhary, Pardeep Singh Bains, Ripendeep Singh, Murotov Nurshod, Rasulbek Eshmetov, Ahmad Abumalek   +8 more
wiley   +1 more source

Discussion on genesis and geological significance of "low resistivity and low gas content" of Longmaxi Formation shale in southeastern Sichuan

Shiyou shiyan dizhi, 2023
In order to clarify the genesis of "low resistivity and low gas content" in the shale of Wufeng-Longmaxi formations and effectively guide the next step of shale gas exploration in Sichuan Basin, a detailed study on the problem based on a large number of ...
Fubin WEI, Zhujiang LIU, Feiran CHEN, Wei YAN, Qiang WANG   +4 more
doaj   +1 more source

The Economic and Budgetary Effects of Producing Oil and Natural Gas From Shale [PDF]

, 2014
[Excerpt] Recent advances in combining two drilling techniques, hydraulic fracturing and horizontal drilling, have allowed access to large deposits of shale resources—that is, crude oil and natural gas trapped in shale and certain other dense rock ...
Congressional Budget Office
core   +1 more source

The revision of baphetids from the Middle Pennsylvanian of the Czech Republic: Morphology, ontogeny, palaeoecology, and the reassessment of the phylogeny of Baphetoidea

The Anatomical Record, EarlyView.
Abstract The baphetoids represent a clade of the Carboniferous stem‐tetrapods (Middle Mississippian—Middle Pennsylvanian) with a characteristic extension of the orbits into antorbital vacuities, which formed keyhole‐shaped openings on the skull. The more derived baphetids were crocodile‐like piscivores frequently occurring in coal‐bearing lacustrine ...
Pavel Barták, Martin Ivanov, Boris Ekrt
wiley   +1 more source

Experimental study on hydrocarbon generation and expulsion characteristics of shale with different source-reservoir structures in Lucaogou Formation, Jimsar Sag, Junggar Basin

Shiyou shiyan dizhi, 2023
The Permian Lucaogou Formation in the Jimusar Sag in the east of the Junggar Basin is a typical continental shale oil series in China. Employing the semi-closed thermal simulation system, an experimental study on hydrocarbon generation and expulsion of ...
Erting LI, Yueyang PAN, Guangqing YANG, Haifeng BAI, Wanyun MA, Jianhui ZENG, Yu ZHANG   +6 more
doaj   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Damage response and influencing factors of plastic damage caused by hydraulic fracturing of shale

Meitan kexue jishu
Shale reservoir hydraulic fracturing is a complex fluid solid coupling physical process. During fracturing, the infiltration of high-pressure fluid in the wellbore can induce the germination of microcracks in the surrounding rock of the wellbore, thereby
Zhonghui SHEN, Lei ZHOU, Dong LIN, Zhiguo GUO, Ziyi WANG, Xijian LI   +5 more
doaj   +1 more source