...M. Qi; E. Yang; Y. Liu; C. Dong; X. Chen Summary The Fuyu oil field is a typical shallow, low-temperature, low-permeability reservoir. At present, the oilfield composite water cut is 95%, artificial fractures interlace with natural fractures, and the distribution of ineffective circulation channels...

...Aishwarya Srinivasan; Joseph Mjehovich; Wen Wang; Kan Wu; Ge Jin; George Moridis Summary Low-frequency distributed acoustic sensing (LF-DAS) has recently received much attention for its ability to monitor fracture propagation at offset wells. Hydraulic Fracture Test Site-2 (HFTS-2), a Department...

...Aishwarya Srinivasan; Yongzan Liu; Kan Wu; Ge Jin; George Moridis Summary Distributed acoustic sensing (DAS) has recently gained importance in monitoring hydraulic fracturing treatments in the oil and gas industry. DAS data contain critical information about the fracture geometry as linearly...

...Fernando Bastos Fernandes; Arthur M. B. Braga Summary The evaluation of geomechanical effects and fluid flow related to pressure transient phenomena in fractured Biot’s stress-sensitive oil reservoirs is essential to minimize the mechanical formation damage and extend the well-reservoir life cycle...

...William J. Bailey Summary This paper presents a generalized methodology for hydraulic fracturing pump schedule (PS) optimization to maximize a stated objective function. The methodology is illustrated using an example where the objective function of interest is return on investment (RoI...

... for completely eroded perforations. In such a case, if the perforation erosion is neglected, the fracture propagation results would greatly deviate from the actual situations. Optimization of perforations is important for shale stimulation. During fracture stimulation, the perforations should not cause...

...Qian Gao; Desheng Zhou; Ahmad Ghassemi; Xiong Liu; Yafei Liu; Minhao Guo Summary As a mature technology to enhance the permeability of geological formations, hydraulic fracturing has widely been used in geothermal energy development and in the petroleum industry. Due to its effectiveness...

...Sihan Yang; Xiaoping Li; Qiguo Liu; Youjie Xu Summary Since there are several hydraulic fractures around a wellbore after a large-scale hydraulic fracturing and the well is not in the center of the reservoir, no corresponding semianalytical model for wellbore pressure analysis has been proposed...

... effectiveness through a comprehensive laboratory/modeling analysis and documented substantial permeability enhancement by dissolution of carbonate-cemented fractures in the near-wellbore area to create wormhole-like high-permeability channels. The study also presented a brief description of successful field...

... side (~900 ft MB-MB well spacing). One of the MB wells was instrumented with fiber optics for cluster-level completion measurements and “frac hit” detection, while the other offset MB well was used to deploy geophones for microseismic mapping. Three different fracture treatment designs were evaluated...

...Lionel Ribeiro; Ashley Thoma; Jason Bryant; Desikan Sundararajan; Wesley Zurovec Summary The paper introduces the results of the first CO 2 fracturing campaign conducted in the Williston Basin. From 2015 to 2019, 11 horizontal multistage wells were safely stimulated using a CO 2 -hybrid design...

...Zhiming Chen; Biao Zhou; Shaoqi Zhang; Wei Yu Summary The conventional dual-porosity model ( Warren and Root 1963 ) may not apply to naturally fractured reservoirs (NFRs), which have poorly connected fractures. To narrow this gap, a new discrete fracture model (DFM)-based numerical well-testing...

...Keito Ikebata; Tomoki Onishi; Kenji Furui; Shusaku Mandai; Yasuhiro Hirano; Yuya Kanamori; Bessie Psihogios; Ryosuke Taniguchi Summary Fracturing fluid diversion plays a crucial role in maximizing the well productivity of multistage fractured wells. Proper sizing and material design of diverting...

... and, especially in cores with cemented fractures filled by carbonate minerals, substantial permeability enhancement was observed. On the other hand, cores treated with OMA after the preflush indicated further permeability enhancement in some cases without cemented fractures, whereas other cases showed...

...Yongzan Liu; Ge Jin; Kan Wu; George Moridis Summary Low-frequency distributed acoustic sensing (LF-DAS) has been used for hydraulic fracture monitoring and characterization. Large amounts of DAS data have been acquired across different formations. The low-frequency components of DAS data are highly...

... during the waterdrive channel adjustment of the Tahe carbonate fractured-vuggy reservoir. The mass, momentum, and turbulence equations of the fluid phase were established in Euler coordinates, whereas the particle motion equations were established based on Newton’s second law. The interaction between...

...Maunish Shah; Nicholas A. Koster; Connor Clark; Subhash N. Shah Summary The technique of employing specialized particulates for far-field diversion is well established during hydraulic fracturing treatments in unconventional formations and is being investigated for use in conventional formations...

...Vibhas Pandey Summary Acid fracturing is a preferred method of stimulating low-permeability limestone formations throughout the world. The treatment consists of pumping alternating cycles of viscous pad and acid to promote differential etching, thereby creating a conductive acid-etched fracture...

... and transport farther into the slots. Fig. 2 Fracture slots networks. Many previous studies have focused on improving proppant transport. These studies include both experimental work and modeling aspects. Table 1 contains a summary of some of the works relevant to this paper in proppant...

...Xu Yang; Boyun Guo; Tamaralayefa A. Timiyan Summary This study focuses on the development of an analytical model to predict the long-term productivity of channel-fractured shale gas/oil wells. The accuracy was verified by comparing productivity calculated by the proposed model with numerical...