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International Journal of Geosciences 2020年第11期11卷 756-767页

作者： muwang wu Hao Liang CNOOC China Ltd Hainan Haikou Hainan

Stress sensitivity is a key factor affecting the productivity of single wells in low permeability gas reservoirs. A well test model for heterogeneous composite gas reservoirs under the influence of stress-sensitive effects was established. Based on the theoretical model, the well test was designed by gradually increasing the pressure difference. The relationship between abnormal high pressure and reservoir stress sensitivity was analyzed. Theoretical research shows that stress sensitivity will cause permeability damage during the production process, and the pressure drop test curve shows that the physical properties of the reservoir have gradually deteriorated. The pressure recovery test curve shows that the physical properties of the reservoir are getting better. Field practice shows that stress sensitivity is related to the formation of abnormally high pressure in the formation without considering the micro-cracks in the formation. Stress-sensitive reservoirs are generally unbalanced and compacted due to overpressure, for fluid expansion/conduction overpressure in Ledong Area. For these reservoirs, there is almost no stress sensitivity. The research results have significance for guiding the design and data interpretation of stress-sensitive reservoir.

关键词： Ledong Area Stress Sensitivity Composite Gas Reservoir Well Test Model Undercompaction Fluid Expansion/Conduction

Safety Control Technology of Deepwater Perforated Gas Well Testing

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Engineering（科研） 2019年第3期11卷 131-136页

作者： Hao Liang muwang wu Zhanjiang Branch of CNOOC Ltd. Zhanjiang China

Due to the high difficulties, high investment, and high risks in deepwater oil and gas well testing, major safety problems can occur easily. A key to prevent accidents is to conduct safety assessment and control on deepwater testing and to improve the testing technology. The deepwater of the South China Sea has some special environmental features: long distance from offshore, frequent typhoons in summer and constant monsoons in winter, and the presence of sandy slopes, sandy ridges and internal waves, coupled with the complex properties of oil and gas reserves which bring more challenges to deepwater well testing. In combination with deepwater well testing practice in the South China Sea, this paper analyzes the main potential risks in deepwater well testing and concludes that there are risks of failures of testing string, tools, and ground processes. Other risks are gas hydrate blockage, reservoir stratum sanding, and typhoon impacts. Specific precautions are also proposed in response to these risks in the paper.

关键词： Safety Control Well Testing Deepwater Risk

Risk Analysis of Gas Hydrate Formation during Deepwater Gas Well Testing

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International Journal of Geosciences 2016年第9期7卷 1057-1063页

作者： Hongjun Yang Liang Hao muwang wu Zhanjiang Branch of CNOOC Ltd. Zhanjiang China

During deep-water gas wells testing period, predicting the generating zone of hydrate precisely in the whole flow range (bore holes and surface flow lines) is the key prerequisite of guarantee for testing flow. The unusual deep-water environment and low gas density make it easy to meet the conditions of hydrate generation during deep-water gas wells testing period, such as low temperature and high pressure, especially under the testing conditions, for instance, near mud line, surface chock line, low gas generating rate and surface shut-in. Wherefore, in view of all the operational modes during testing period (clean-out, variable rate flow, downhole and surface shut-in), based on temperature field of the whole flow range and phase equilibrium condition of hydrate, predicting method of hydrate generation zone is published;by taking enthalpy as the object of study, temperature calculation model increases the accuracy of temperature prediction;by integration of bore holes and surface lines, predicting plate of hydrate generation in the whole flow range is published. During flow period, the generating condition of hydrate is affected by rate of flow, and the lower the rate of flow is, the wider the hydrate generation zone is;during the stage of shut-in and initial flow, if pressure of strings is higher and temperature is lower, risk of hydrate generation will be greater and hydrate generation zone will be larger, so relevant actions should be taken to restrain hydrate generation.

关键词： Risk Analysis Deepwater Gas Well DST Gas Hydrate

Productivity Testing Design Method of Multi-Factor Control for Unconsolidated Sandstone Gas Reservoir

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Engineering（科研） 2016年第11期8卷 815-822页

作者： muwang wu Hao Liang Mingjie Zhang Dianqiang Sun Peng Zhong CNOOC China Ltd. Zhanjiang Branch Zhanjiang China

Reservoir safety, testing-string safety, and flow control are key factors that should be considered in deep-water unconsolidated sandstone gas well testing work system. Combined with the feature of testing reservoir, pipe string type and sea area, the required minimum testing flow rate during cleaning up process, as well as minimum test flow rate without hydrate generation, pipe string erosion critical production, the maximum testing flow rate without destroying sand formation and the minimum output of meeting the demand of development was analyzed;based on the above critical test flow rates, testing working system is designed. Field application showed that the designed work system effectively provided good guidance for field test operations;no sand production or hydrate generation happened during the test process;the test parameter evaluated the reservoir accurately;the safe and efficient test operation was achieved.

关键词： Multi-Factor Control Productivity Testing Unconsolidated Sandstone Gas Well Hydrate Sanding

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超深水基岩潜山储层分布式光纤温度试井方法

油气井测试 2024年第3期33卷 1-7页

作者：梁豪吴木旺卢聪中海石油(中国)有限公司海南分公司勘探开发部海南海口570312 西南石油大学油气藏地质及开发工程国家重点实验室四川成都610500

超深水永乐X区潜山气藏具有储层非均质强、纵向岩性组合多样的特征,传统生产测井技术在落实储层产出特征时存在局限性。采用分布式光纤测温技术测试获得了YL1井产能测试生产层段的温度数据,结合渗流力学和流体力学理论,建立了气藏渗流... 详细信息

超深水永乐X区潜山气藏具有储层非均质强、纵向岩性组合多样的特征,传统生产测井技术在落实储层产出特征时存在局限性。采用分布式光纤测温技术测试获得了YL1井产能测试生产层段的温度数据,结合渗流力学和流体力学理论,建立了气藏渗流和井筒管流温度—压力场双耦合模型,计算了气井产出剖面变化引起的温度响应特征。采用Levenberg Marquart(LM)反演算法实现了YL1气井产出剖面定量解释分析。研究结果表明,气井多层测试时高渗层对应井筒温度下降斜率大,温度变化速度快,温降大,通过温度剖面可以作为判断高渗地层、裂缝或非产层产出贡献;利用建立的分布式光纤温度产出剖面解释方法,定量评价获得了砂砾质风化带、风化裂缝带和内幕裂缝带产出贡献,解释结果与录井气测率具有正相关性,且与地质认识吻合,证明了解释理论的可靠性。研究结果对分布式光纤温度监测多层气藏产出剖面技术的推广具有重要理论及应用价值。

关键词：超深水基岩潜山分布式光纤温度试井产出剖面温度解释模型潜山气藏

基于临界流量的深水探井测试关键技术与实践——以琼东南盆地深水区为例

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天然气工业 2015年第10期35卷 65-70页

作者：吴木旺杨红君梁豪姜洪丰陈鸣中海石油(中国)有限公司湛江分公司

深水探井测试对于深海油气田的勘探发现和开发方案的制订起着至关重要的作用。为此,针对琼东南盆地陵水凹陷深水测试面临的海床温度低、管柱压力大,以及地层水或凝析水具有生成天然气水合物(以下简称水合物)堵塞测试管柱等技术难题,在... 详细信息

深水探井测试对于深海油气田的勘探发现和开发方案的制订起着至关重要的作用。为此,针对琼东南盆地陵水凹陷深水测试面临的海床温度低、管柱压力大,以及地层水或凝析水具有生成天然气水合物(以下简称水合物)堵塞测试管柱等技术难题,在分析总结南海北部珠江口盆地多口深水探井与国外合作测试作业成功经验的基础上,研究形成了该区测试期水合物形成区域预测及水合物防治方法;建立了基于临界测试流量设计测试工作制度;结合地质录井、MDT测井等资料.建立了可视化数值试井模型并对压力恢复时间进行合理设计;通过对深水测试管柱结构的优化,提出了深水测试一开一关的测试程序,从而达到多开多关测试程序的功能;通过对地面测试流程的模块化方案设计,增强了深水测试的安全性和高效性。实践结果表明:测试期间水合物和地层出砂得到了有效防治.测试管柱及模块化地面流程经受住了高产气流的考验,获得了完整的测试资料,节省了测试时间,达到了准确评价储层的目的,并基本形成了我国的深水油气井测试技术。

关键词：琼东南盆地深水测试天然气水合物出砂工作制度一开一关模块化

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琼东南盆地深水区高渗气井测试设计关键技术

中国海上油气 2015年第6期27卷 31-36页

作者：吴木旺梁豪姜洪丰中海石油(中国)有限公司湛江分公司广东湛江524057

针对深水高渗气井测试若采用传统的大压差、过高流量放喷、求产的做法易导致储层出砂、坍塌、测试管柱变形或破坏,甚至井口装置、地面流程也遭破坏等问题,通过深水气井测试程序简化,创新形成了"快速清井、低速取样、调产缓变、关井恢复... 详细信息

针对深水高渗气井测试若采用传统的大压差、过高流量放喷、求产的做法易导致储层出砂、坍塌、测试管柱变形或破坏,甚至井口装置、地面流程也遭破坏等问题,通过深水气井测试程序简化,创新形成了"快速清井、低速取样、调产缓变、关井恢复"的一开一关井测试程序;通过临界测试流量分析,确定携液所需最小测试气流量、不形成水合物所需最小测试气流量及储层不出砂最大测试流量,进而设计出了合理的测试工作制度;通过建立数值试井模型,确定了压力恢复和探边测试时间。本文方法有效指导了琼东南盆地深水区陵水凹陷LSX-N-1井测试作业顺利进行,测试施工与设计基本一致,达到了准确评价气田的目的,能够为类似深水气井测试作业设计提供理论依据与实用方法指导。

关键词：气井测试程序工作制度探边测试深水区琼东南盆地

INFACT气测录井解释方法在北部湾盆地的应用

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中国海上油气 2012年第6期24卷 20-24页

作者：王雷郭书生杨红君吴木旺陈春涌蔡军中海石油(中国)有限公司湛江分公司中法渤海地质服务公司

针对目前北部湾盆地气测录井定量解释方法简单落后、针对性和适应性差等现状,为进一步提高气测录井资料评价油气层的准确性,实现快速评价储层流体性质,引进了INFACT气测录井解释软件。通过对北部湾盆地已钻井进行综合分析和研究,建立了... 详细信息

针对目前北部湾盆地气测录井定量解释方法简单落后、针对性和适应性差等现状,为进一步提高气测录井资料评价油气层的准确性,实现快速评价储层流体性质,引进了INFACT气测录井解释软件。通过对北部湾盆地已钻井进行综合分析和研究,建立了该地区流体相模版,确定了渗透层含烃饱和度指标,即单位岩石地表气体体积门限值,进而实现了储层流体类型快速评价。实际应用效果表明,该方法的解释符合率平均已达到95%,应用效果良好。

关键词：北部湾盆地 INFACT软件气测录井流体相模版单位岩石地表气体体积门限应用效果

Sex-dependent alterations in extracellular vesicles linking chronic spinal cord injury to brain neuroinflammation and neurodegeneration

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Neural Regeneration Research 2025年第2期20卷 483-484页

作者： Yun Li Junfang wu Department of Anesthesiology&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumatic spinal cord injury(SCI)is a devastating exogenous injury with long-lasting consequences and a leading cause of death and disability *** in assistive technology,rehabilitative interventions,and the ability to identify and intervene in secondary conditions have significantly increased the long-term survival rate of SCI patients,with some people even living well into their seventh or eighth *** survival changes have led neurotrauma researchers to examine how SCI interacts with brain *** health and epidemiological data showed that patients with long-term SCI can have a lower life expectancy and quality of life,along with a higher risk of comorbidities and complications.

关键词： alterations inflammation injury

A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

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Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China State Grid Information&Communication Company of Hunan Electric Power Corporation Changsha410118China State Grid Hunan Electric Power Corporation Chenzhou Power Supply Branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security