Optimized Proration Plan Based on Stable Production in Luojiazhai High-sulfur Gas Reservoir

doi:10.3969/j.issn.1006-6535.2024.03.019

Abstract

Abstract: The gathering system of Luojiazhai high-sulfur gas reservoir is affected by sulfur accumulation, the interlock alarm is frequently triggered by the gas well pressure after the secondary throttling. To avoid the interlocking shut-in, the production can only be maintained by means of pressure reduction. By analyzing the relationship between average daily gas production and sulfur accumulation of single well during the phase, it is found that as the ratio of gas production per well increased, the sulfur accumulation also shows an increasing trend. In order to extend the continuous production cycle of single well and reduce the sulfur accumulation and its impact on the gathering system, the traditional production proration method currently used can no longer meet the production requirements. To obtain the optimal stable production period of gas reservoirs, this paper starts from various factors affecting production proration of single well, and establishes a nonlinear mathematical model with the optimal stable production period as the objective function through node analysis. Taking into account constraints such as gas well productivity, critical sulfur-carrying production, maximum production limit of safety valve after throttling, and maximum production corresponding to interlocking pressure after secondary throttling, the single well production proration corresponding to the optimal stable production period is obtained by iterative computation based on differential calculus. According to the optimal production proration plan, production adjustments were made to 6 production wells. After the secondary throttling, the average pressure drop of single wells is about 0.3 MPa, the average stable production days increased from 106 d to 201d, and the sulfur accumulation in gathering system decreased by 121 kg. The method effectively guides the production of gas wells and also provides reference significance for optimizing production allocation in similar gas fields.

Key words: high sulfur gas reservoir, sulfur accumulation, nodal analysis, nonlinear optimization, production proration of single well

CLC Number:

TE341

Lan Yunxia, Jia Changqing, Liao Huawei, Zhang Junliang, Xue Jiangtang, Zhang Qiang, Li Xiang. Optimized Proration Plan Based on Stable Production in Luojiazhai High-sulfur Gas Reservoir[J]. Special Oil & Gas Reservoirs, 2024, 31(3): 143-149.

References

[1] TURNER R G M G.Analysis and prediction of mini-mum mlow rate for the continuous removal of liquids from gas well[J].Journal of Petroleum Technology,1969,21(11):1475 -1482.
[2] COLEMAN S B B.A new look at predicting gas well load up[J].Journal of Petroleum Technology,1991,43(3):329-333.
[3] NOSSEIR M A,DARWICH T A.A new approach for accurate prediction of loading in gas well under different flowing conditions[J].SPE Production & Facilities,2000,15(4):241-246.
[4] 张茂林,张娴,杨龙,等.考虑吸附滞后的页岩气藏流动物质平衡方程[J].长江大学学报(自然科学版),2022,19(4):49-59.
ZHANG Maolin,ZHANG Xian,YANG Long,et al.Flowing material balance equation of shale gas reservoirs considering adsorption hysteresis[J].Journal of Yangtze University (Natural Science Edition),2022,19(4):49-59.
[5] 陈京元,周静,郑伟,等.川东北飞仙关组气藏气井合理产量的研究[J].天然气勘探与开发,2003,26(1):14-21.
CHEN Jingyuan,ZHOU Jing,ZHENG Wei,et al.Study on reasonable production of gas wells in Feixianguan Formation gas reservoir in northeast Sichuan[J].Natural Gas Exploration and Development, 2003,26(1):14-21.
[6] 王如燕,石新朴,颜泽江.克拉美丽气田火山岩气藏试采特征[J].新疆石油地质,2009,30(6):745-747.
WANG Ruyan,SHI Xinpu,YAN Zejiang.Production test characteristics of volcanic gas reservoir in Kelameili Gasfield[J].Xinjiang Petroleum Geology, 2009,30(6):745-747.
[7] 马俯波,何顺利,门成全.兴城火山岩底水气藏开采机理研究[J].石油天然气学报,2010,32(1):110-114.
MA Fubo,HE Shunli,MEN Chengquan.Study on the development mechanism of volcanic rock bottom water gas reservoir in Xingcheng[J].Journal of Oil and Gas Technology,2010,32(1):110-114.
[8] 蔡磊,贾爱林,唐俊伟,等.苏里格气田气井合理配产方法研究[J].油气井测试,2007,16(4):25-28.
CAI Lei,JIA Ailin,TANG Junwei,et al.Study on determine production proration of single well for Sulige Gas Field[J].Well Testing,2007,16(4):25-28.
[9] 杨亚涛,王宏,张晓燕,等.苏里格东部气田气井合理配产技术[J].石油化工应用,2009,28(7):54-57.
YANG Yatao, WANG Hong, ZHANG Xiaoyan, et al.Reasonable production proration technique of eastern Sulige Gasfield[J].Petrochemical Industry Application, 2009,28(7):54-57.
[10] 李瑞磊,胡雅君,徐雁军.松南地区气井供应能力分析及合理配产研究[J].石油钻探技术,2002,30(4):60-62.
LI Ruilei,HU Yajun,XU Yanjun.Research on gas well producing capacity and the reasonable output in Songnan Area[J].Petroleum Drilling Techniques, 2002,30(4):60-62.
[11] 钟兵,杨雅和,夏崇双,等.砂岩多层气藏多层合采合理配产方法研究[J].天然气工业,2005,25(增刊):104-106.
ZHONG Bing,YANG Yahe,XIA Chongshuang, et al.Study on reasonable production proration method of multi-layer commingled production in sandstone multi-layer gas reservoir[J].Natural Gas Industry, 2005,25(Sl):104-106.
[12] 刘晓华,邹春梅,姜艳东.现代产量递减分析基本原理与应用[J].天然气工业,2010,30(5):1-5.
LIU Xiaohua,ZOU Chunmei,JIANG Yandong.Theory and application of modern production decline analysis[J].Natural Gas Industry, 2010,30(5):1-5.
[13] LEE A,SARONOFSKY J S.A linear programming model for scheduling crude oil production[J].Journal of Petroleum Technology,1958,10(7):51-54.
[14] 曹立迎,林会喜,曹飞,等.基于数值试井的断溶体油藏储集体动态表征[J].油气地质与采收率,2023,30(6):150-159.
CAO Liying,LIN Huixi,CAO Fei,et al.Dynamic characterization of reservoir spaces in fault-karst reservoir based on numerical well testing[J].Petroleum Geology and Recovery Efficiency,2023,30(6):150-159.
[15] 陈武,陈光海.气田气井增产措施经济极限分析研究[J].钻采工艺,2003,26(5):32-33.
CHEN Wu,CHEN Guanghai.Economic limit analysis on gas field stimulation treatment[J].Drilling & Production Technology,2003,26(5):32-33.
[16] 刘秀婷,王胜义,杨军.产量优化模型的建立及应用探讨[J].断块油气田,2001,8(6):50-52.
LIU Xiuting,WANG Shengyi,YANG Jun.Discussion on building and application of production optimization model[J].Fault-Block Oil & Gas Field, 2001,8(6):50-52.
[17] 张传平,刘福顺,黄向东.控制论方法在油气田产量规划中的应用[J].石油大学学报(自然科学版),2001,25(2):32-34.
ZHANG Chuanping,LIU Fushun,HUANG Xiangdong.The application of cybernetic theory in oil and gas field production planning[J].Journal of China University of Petroleum(Edition of Natural Science), 2001,25(2):32-34.
[18] 卢立泽.气井及气藏优化配产方法研究及软件系统设计[D].成都:西南石油学院,2005.
LU Lize.Study on optimal production proration method of gas wells (reservoir) and design of software system[D].Chengdu:South West Petroleum University,2005.
[19] 唐海,黄炳光,刘志斌,等.气井(藏)动态优化配产方法研究[J].天然气工业,1998,18(3):57-60.
TANG Hai, HUANG Bingguang, LIU Zhibin, et al.Study on dynamic optimization production proration method of gas well (reservoir)[J].Natural Gas Industry,1998,18(3):57-60.
[20] 杜君,张海燕,王玮,等.考虑气井排液的节点分析方法及应用[J].天然气工业,2004,24(1):43-46.
DU Jun,ZHANG Haiyan,WANG Wei,et al.Node analysis method in consideration of discharge fluids in gas well and its application[J].Natural Gas Industry, 2004,24(1):43-46.
[21] 张宗林,赵正军,张歧,等.靖边气田气井产能核实及合理配产方法[J].天然气工业,2006,26(9):106-108.
ZHANG Zonglin,ZHAO Zhengjun,ZHANG Qi,et al.Jingbian Gasfield well productivity verification & proper production proration[J].Natural Gas Industry, 2006,26(9):106-108.
[22] 崔书章,秦学成,沈阿平.利用IPR流入曲线确定气井合理工作制度的探讨[J].油气井测试,2008,17(3):5-6.
CUI Shuzhang,QIN Xuecheng,SHEN Aping.Discussing on reasonable working rule in gas well by IPR curve[J].Well Testing, 2008,17(3):5-6.
[23] 吴晓东,肖伟,刘晓娟,等.苏里格气田气井工作制度优化[J].天然气工业,2007,27(12):108-110.
WU Xiaodong,XIAO Wei,LIU Xiaojuan,et al.Production parameters optimization of gas wells in Sulige Gas Field[J].Natural Gas Industry,2007,27(12):108-110.
[24] 丁显峰,刘志斌,潘大志.基于Powell遗传退火精确罚函数法求解气井产量动态优化模型[J].大庆石油地质与开发,2010,29(6):110-114.
DING Xianfeng,LIU Zhibin,PAN Dazhi.Dynamically optimized model to solve gas well production by using Powell genetic annealing method with exact penaltyh function[J].Petroleum Geology & Oilfield Development in Daqing, 2010,29(6):110-114.
[25] 赵明敏,刘启国,夏家祥.气井及气藏优化配产综述[J].重庆科技学院学报(自然科学版),2011,13(1):58-60.
ZHAO Mingmin,LIU Qiguo,XIA Jiaxiang.Review on gas wells and optimization allocation of gas reservoir[J].Journal of Chongqing University of Science and Technology(Natural Sciences Edition),2011,13(1):58-60.
[26] 廖勇,帅永乾,卢立泽,等.气井(藏)动态优化配产软件系统设计与实现[J].西南石油学院学报, 2003,25(2):24-26.
LIAO Yong,SHUAI Yongqian,LU Lize,et al.Design and realiization of gas well/reservior dynamic optimizing proration software systerm[J].Journal of Southwestern Petroleum Institute, 2003,25(2):24-26.
[27] 程奇,刘宗宾,王建立,等. 变质岩潜山储层结构及其生产动态响应:以渤海锦州25-1南油田为例[J]. 东北石油大学学报,2022,46(1):26-35.
CHENG Qi,LIU Zongbin,WANG Jianli,et al. Reservoir structure and production dynamic response of metamorphic buried hill:taking JZ25-1S Oilfield in Bohai Sea as an example[J]. Journal of Northeast Petroleum University,2022,46(1):26-35.