Results 31 to 40 of about 144 (128)

Acoustic radiation and reflection of a logging-while-drilling dipole source

Geophysical Journal International, 2019
SUMMARY With the comparison to the resistivity ultra-deep measurement, the single-well reflection survey in acoustic logging-while-drilling (ALWD) measurement lags far behind, especially ALWD dipole measurement has long been thought to be little added value.
Zhoutuo Wei, Xiaoming Tang, Jingji Cao
openaire   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

DeepSeg-based noise reduction algorithm trained on a hybrid synthetic dataset for signals from acoustic logging-while-drilling

Artificial Intelligence in Geosciences
Acoustic logging-while-drilling (ALWD) enables real-time acoustic measurements during drilling operations. However, challenging downhole conditions introduce considerable noise into ALWD signals.
Xin Fu, Junyi Song, Yang Gou
doaj   +1 more source

Multi‐factor coupling effects in hydraulic fracturing of laminated shale: Experimental insights and physics‐informed neural network‐driven optimization

Deep Underground Science and Engineering, EarlyView.
This study establishes a multi‐factor coupling framework for predicting breakdown pressure in laminated shale by integrating experimental hydraulic fracturing tests, physics‐informed neural networks (PINNs), and Sobol sensitivity analysis. It reveals how differential stress, the bedding dip angle, and the injection rate interact to influence fracture ...
Tao Wang, Guoyao Xu, Liyuan Liu, Yao Zhang, Sitao Zhu, Hongyang Chu, Kaikai Zhao   +6 more
wiley   +1 more source

Sensing While Drilling and Intelligent Monitoring Technology: Research Progress and Application Prospects

Sensors
Obtaining accurate information on stratigraphic conditions and drilling status is necessary to ensure the safety of the drilling process and to guarantee the production of oil and gas.
Xiaoyu Li, Zongwei Yao, Tao Zhang, Zhiyong Chang   +3 more
doaj   +1 more source

Distribution and causes of present-day overpressure of Shahejie Formation in Linnan Subsag, Huimin Sag, Bohai Bay Basin

Shiyou shiyan dizhi, 2020
The Linnan Subsag is a main hydrocarbon generating area in the Huimin Sag of the Jiyang Depression, Bohai Bay Basin. Oilfields mainly are in the subsag or on the southern and northern faults. Overpressure is found in the Shahejie Formation.
Zhiying HUO, Sheng HE, Yongshi WANG, Xiaowen GUO, Gangtian ZHU, Wen ZHAO   +5 more
doaj   +1 more source

Evaluation of Drillability of the Mahu Conglomerate Formation in Xinjiang, China

Energy Science &Engineering, EarlyView.
This graphical abstract illustrates the workflow for developing an optimized prediction model using measurement while drilling (MWD) data. A total of 90 MWD cases are divided into a training set (80%) and a test set (20%). Four logging‐while‐drilling parameters—compensation density, acoustic travel time, resistivity, and neutron porosity—are selected ...
Yun Xia, Wan Zhu, Rui Chen, Hui Zhang, Boyuan Yang, Kunhong Lv, Baokang Wu, Xinrui Wang, Hu Wu   +8 more
wiley   +1 more source

Faults identification based on high-resolution multilayer mapping while drilling service

Известия высших учебных заведений: Геология и разведка
Background. Drilling horizontal wells into Jurassic formations in Yamal-Nenets Autonomous Okrug (YNAO) fields involves faults intersection [5]. In such cases, horizontal section geosteering strategy after crossing a fault is based on an assessment of the
A. A. Rasskazov, E. P. Ageeva, P. V. Bybin   +2 more
doaj   +1 more source

Charring Behaviour of Mass Timber: A Comparison of Thin Intumescent Coatings and Plasterboard

Fire and Materials, EarlyView.
ABSTRACT This study compares the charring behaviour of mass timber under varied heating conditions when protected by either different thin intumescent coating types or fire‐rated plasterboard layers. Bench‐scale fire experiments were conducted using the Heat‐Transfer Rate Inducing System (H‐TRIS).
Stavros Spyridakis, Anwar Orabi, Cristian Maluk, David Barber, Felix Wiesner   +4 more
wiley   +1 more source

Multiphase Tectonic Process With Slab Dynamics in the Northern East China Sea Shelf Basin

Geological Journal, EarlyView.
Megasequence 1 characterised by Palaeocene extension and differential subsidence driven by the rollback of the subducting Izanagi Plate. Megasequence 2 records a kinematic reorganisation of the East Asian margin, transition from a rifting to a compressional regime.
Juhwan Woo, Won‐Ki Kim, Chul Woo Rhee, Seungyeol Lee   +3 more
wiley   +1 more source