【摘要】：根據(jù)番禺油田后續(xù)開發(fā)需要,番禺油田在原番禺4-2WHP平臺和番禺5-1WHP平臺東南側(cè)各新建一套新的生產(chǎn)設(shè)施。由于新開發(fā)區(qū)域稠油含量較高,故新平臺集輸工藝系統(tǒng)設(shè)計重點是原油安全外輸,同時還要保持外排含油污水達標,外輸海管安全可靠輸送原油等目的。海洋石油平臺是海上油田開發(fā)生產(chǎn)集輸系統(tǒng)的核心,主要作用是進行油氣水初步分離。論文圍繞原油處理、含油污水處理和海管外輸三個方面展開,在原油和含油污水處理系統(tǒng)設(shè)計中,使用較為可靠的API及ASME標準做為理論初算依據(jù),利用HYSYS軟件對原油和含油污水處理工藝進行處理能力和操作參數(shù)的模擬計算；參照已投產(chǎn)的番禺4-2WHP平臺運行參數(shù),綜合考慮番禺4-2DPPA平臺外輸原油物性參數(shù)、外輸壓力、FPSO入口壓力、新老海管三通匯合處入口壓力、海管油品溫度、流量等因素,設(shè)計研究了番禺4-2DPPA平臺原油的外輸海管工藝；考慮到新投產(chǎn)平臺采出液粘度和含蠟量較高,采用Pipesim軟件,模擬研究了番禺4-2DPPA平臺海管的最低輸量,同時探討了海管投產(chǎn)預(yù)熱與停輸預(yù)熱、平臺關(guān)閉對海管水力與熱力的影響、海管允許停輸時間、海管置換及主要操作參數(shù)的敏感性。研究結(jié)果表明,正常工況下原油經(jīng)二級處理后含水率可達到15%以下,含油污水經(jīng)過水力旋流和氣浮以后可達到含油量小于20 mg/L,原油和含油污水處理結(jié)果滿足番禺4-2DPPA初始設(shè)計要求；在二級分離的含水原油增壓、加熱至98℃再經(jīng)電脫水器脫水后,含水量可小于0.5%；；番禺4-2DPPA平臺在200 m3/d的最低輸量下,番禺4-2WHP與番禺4-2DPPA平臺外輸流量必須大于510 m3/d(含水率15%)才能保證混合原油順利流入下游FPSO;外輸海管停輸最低溫度為40℃,允許停輸時間為2 h,流量比溫度與原油粘度對海管壓力的影響更敏感,這不僅為番禺油田的油藏調(diào)整及二次開發(fā)生產(chǎn)方案設(shè)計與生產(chǎn)運行流動安全保障提供了理論參考,而且對其它類似的海洋油氣田集輸規(guī)劃設(shè)計具有示范作用。
[Abstract]:According to the needs of the subsequent development of Panyu Oilfield, Panyu Oilfield has built a new set of production facilities on the southeast side of the former Panyu 4-2WHP platform and Panyu 5-1WHP platform. Because of the high content of heavy oil in the new development area, the design focus of the new platform gathering and transportation process system is the safe external transportation of crude oil, at the same time, it is necessary to keep the oily wastewater discharged from the outer oil up to the standard, and the outer sea pipe to transport crude oil safely and reliably. Offshore oil platform is the core of offshore oil field development and production gathering and transportation system, and its main function is to separate oil, gas and water. This paper focuses on three aspects: crude oil treatment, oily wastewater treatment and marine pipeline transportation. In the design of crude oil and oily wastewater treatment system, the reliable API and ASME standards are used as the theoretical preliminary calculation basis, and HYSYS software is used to simulate the treatment capacity and operation parameters of crude oil and oily wastewater treatment process. According to the operation parameters of Panyu 4-2WHP platform, the external crude oil transportation technology of Panyu 4-2DPPA platform is designed and studied by considering the physical parameters of Panyu 4-2DPPA platform, the external transportation pressure, the FPSO inlet pressure, the inlet pressure at the junction of the new and old sea management channels, the oil product temperature, the flow rate and so on. Considering the high viscosity and wax content of produced liquid on the newly put into operation platform, the minimum transportation capacity of sea pipe on Panyu 4-2DPPA platform is simulated and studied by using Pipesim software. At the same time, the effects of preheating and shutdown preheating and platform closure on the hydraulic and thermal power of sea pipe, the allowable shutdown time of sea pipe, the replacement of sea pipe and the sensitivity of main operating parameters are discussed. The results show that the moisture content of crude oil can reach less than 15% after secondary treatment under normal working conditions, and the treatment results of oily sewage with oil content less than 20 mg/L, crude oil and oily wastewater can meet the initial design requirements of Panyu 4-2DPPA after hydrocyclone and air floatation, and the water content can be less than 0.5% after heating to 98 鈩，

本文編號：2507135