Jianfang Jiang

China University of Petroleum, Beijing

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Dongsheng Zhu

Physikalisch-Technische Bundesanstalt

Ting Xiong

Wuhan University of Technology

Jingwen Liang

Beijing University of Posts and Telecommunications

Yunfeng Wang

Lanzhou Jiaotong University

Jing Qi

Zhejiang University

Shan Zhao

Henan Polytechnic University

Weicheng Tong

Quzhou University

Bo Xiao

Queen's University Belfast

Yong Huang

China Aerodynamics Research and Development Center

Qiyu Wang

Shanghai Jiao Tong University

Cooperative Institutions

China University of Petroleum, Beijing

Shandong University

China National Petroleum Corporation (China)

Research Institute of Petroleum Exploration and Development

Sinopec (China)

Yangtze University

Sun Yat-sen University

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

China University of Petroleum, East China

Zhejiang University

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GC/MS analysis of coal tar composition produced from coal pyrolysis

DOAJ (DOAJ: Directory of Open Access Journals) (2007)

Jianfang Jiang Qiyu Wang Yingyu Wang Weicheng Tong Bo Xiao

tar (computing)

Coal tar

Destructive distillation

Source

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Influence of Migration and Plugging of Nanoparticles on Coal Permeability in Coal Reservoirs

Geofluids (2021)

Xiaopeng Zhai Weihong Chen Yun Xu Yishan Lou Shuhong Xu

The plugging of nanopores in low-permeability coal reservoirs is an important factor that affects productivity reduction. However, the mechanism of plugging of the nanopores in coal reservoirs remains unclear. In this study, the coal samples from the Anze coalbed methane block of the North China Oilfield are used as the research object. Experiments are conducted on the mechanism of nanopore plugging by the variation of nanopore permeability based on the pressure oscillation method and the nanopore (scanning electron microscope) method. The research shows that the foreign working fluid invades a coal sample; the sample changes from being hydrophobic to being water absorbent within a certain period. The instability caused by the expansion of coal clay mineral particles promotes the dispersion and shedding of particles, and the migration of particles is accelerated under the shear stress of the working fluid. In addition, the viscosity and pressure difference of the working fluid are important factors that affect particle plugging. The viscosity of the fluid increased by two times, and permeability decreased by 1.21 times. As the pressure difference increases by two times, permeability can be reduced by up to two orders of magnitude. The findings of this study can help for better understanding of the mechanism of plugging of the nanopores in coal reservoirs and the reasons of production reduction in low-permeability coal reservoirs. Such findings provide theoretical support for the selection of the working fluid, and reasonable production pressure difference can effectively reduce the damage on coal permeability in a low-permeability coal reservoir.

Nanopore

Coalbed Methane

10.1155/2021/8886426

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Design and Application of an Alkaline‐Surfactant‐Polymer Flooding System in Field Pilot Test

Journal of Dispersion Science and Technology (2005)

Ganzuo Li∗Jian Xu J.‐H. Mu Lun Zhai Lingling Shui

We have developed an inexpensive sort of flooding reagent whose major components are natural mixed carboxylates from proportionally mixed saponification residuals of cottonseed oil, tea oil, vegetable oil, and soybean oil. An orthogonal test design method was used to select one form of this flooding reagent (which is named SD) by measuring the phase behavior and another form of the flooding system: alkaline/surfactant/polymer (named SD‐ASP). The optimal composition was obtained by measuring the transient interfacial tension (IFT) at the crude oil/aqueous interface. Results of the tests show that the SD‐ASP flooding systems are tolerant to salt up to 1.5×105 mg/L and to Ca2+ and Mg2+ to 5.0×103 mg/L at 90°C, the IFTmin (the minimum of IFT) is 10−3 mN/m, and the oil recovery ratio reaches 22.77% by using the core flood experiment. The pilot tests, including a putting in and sending out in a single oil well, a group oil well and a larger well region, were all very successful, with an average input‐output ratio of 1∶4.15. All these results demonstrate that the SD‐ASP formulation is a new, very inexpensive, and highly effective flooding system.

Saponification

Oil in place

Cottonseed oil

10.1081/dis-200063021

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Citations (13)

Review on the Development of Multi-lateral Well Technology

Mechanisms and machine science (2023)

Qirui Yan Jianfang Jiang Na Zhu

Technology Development

Directional Drilling

10.1007/978-3-031-42987-3_74

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<b>GC/MS ANALYSIS OF COAL TAR COMPOSITION PRODUCED FROM COAL PYROLYSIS</b>

Bulletin of the Chemical Society of Ethiopia (2007)

Jianfang Jiang Qiyu Wang Yingyu Wang Weicheng Tong Bo Xiao

Coal tar is a significant product generated from coal pyrolysis. A detailed analytical study on its composition and chemical structure will be of great advantage to its further processing and utilization. Using a combined method of planigraphy-gas chromatograph/mass spectroscopy (GC/MS), this work presents a composition analysis on the coal tar generated in the experiment. The analysis gives a satisfactory result, which offers a referable theoretical foundation for the further processing and utilization of coal tar. KEY WORDS: Coking-coals, Coal pyrolysis, Coal tar, GC/MS Bull. Chem. Soc. Ethiop. 2007, 21(2), 229-240.

tar (computing)

Coal tar

Dry distillation

Destructive distillation

10.4314/bcse.v21i2.21202

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Citations (32)

The Generation, Stabilization and Migration Rules of Crude Oil Emulsion During the Process of Amphiphilic Polymer Flooding

SPE Improved Oil Recovery Conference (2018)

Yao Lu Zhe Li Hairong Wu Jiatong Jiang Jianfang Jiang

Abstract It has been proven by field tests that crude oil recovery could be enhanced with the generation of stable emulsions. Amphiphilic polymers display better capability in emulsifying crude oil as compared with that of traditional polymers attributing to the co-existence of hydrophilic and hydrophobic groups in molecular chains. To investigate the generation of emulsified oil droplets with the hydrophobically modified polyacrylamide (HMPAM) in reservoirs, porous mesh shearing method to generate emulsions was first conducted. The stabilization mechanism was then elucidated by comparing properties of emulsions which are stabilized by HMPAM with different degree of β-cyclodextrin (β-CD) inclusion. The flow behavior of various HMPAM emulsions was further evaluated by rheological method and comparative seepage experiments. The results show that the snapping action of residual oil and the shearing action of HMPAM solution in porous media are the main reasons of the generation of emulsions, the emulsifying property of which is mainly affected by the concentration of HMPAM, injection rate, migration distance as well as the average diameter of pore throats. β-CD could mask hydrophobic groups on HMPAM molecules because of the host-guest interaction, resulting in a transition of corresponding polymer emulsion from stable state to unstable one. Over 80% reduction in stability index is observed after inclusion for the emulsion with polymer concentration above the critical aggregation concentration, indicating that the presence of hydrophobic groups is the most important source of emulsifying and stabilizing capability of HMPAM. Furthermore, the viscoelasticity of the emulsion system is enhanced by the synergistic effect of supramolecular networks and emulsified oil droplet. During its transport through porous media, the polymer emulsion shows high flow resistance and its injection pressure exhibits an obviously creeping fluctuation increasing phenomenon as compared to surfactant emulsion and sheared polymer solution.

Pickering emulsion

Polyacrylamide

Oil droplet

10.2118/190220-ms

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Citations (4)

CCDC 1034465: Experimental Crystal Structure Determination

The Cambridge Structural Database (2017)

Jianfang Jiang Jingwen Liang Shan Zhao Yunfeng Wang Jing Qi

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc13qfv3

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Syntheses, Crystal Structures and Luminescent Properties of Drum and Ladder-Like Organooxotin Clusters with Carbazole Ligand

Journal of Cluster Science (2016)

Jianfang Jiang Jingwen Liang Shan Zhao Yunfeng Wang Jing Qi

Carbazole

Nanochemistry

Crystal (programming language)

10.1007/s10876-016-1092-x

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Citations (5)