[1]方濤 劉義剛 白健華 陳華興 趙順超 龐銘.海上高含蠟油田井筒清蠟周期預測圖版建立及應用[J].石油鉆采工藝,2018,40(6):823-828.[doi:10.13639/j.odpt.2018.06.024]
 FANG Tao,LIU Yigang,BAI Jianhua,et al.Establishment and application of paraffin removal cycle prediction chart in offshore highly waxy oil fields[J].Oil Drilling & Production Technology,2018,40(6):823-828.[doi:10.13639/j.odpt.2018.06.024]
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海上高含蠟油田井筒清蠟周期預測圖版建立及應用
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《石油鉆采工藝》[ISSN:1000-7393/CN:13-1072/TE]

卷:
40卷
期數:
2018年6期
頁碼:
823-828
欄目:
油氣開采
出版日期:
2018-11-20

文章信息/Info

Title:
Establishment and application of paraffin removal cycle prediction chart in offshore highly waxy oil fields
文章編號:
1000 – 7393( 2018 )06 – 0823– 06
作者:
方濤 劉義剛 白健華 陳華興 趙順超 龐銘
中海石油(中國)有限公司天津分公司
Author(s):
FANG Tao LIU Yigang BAI Jianhua CHEN Huaxing ZHAO Shunchao PANG Ming
CNOOC (China) Limited Tianjin Branch, Tianjin 300459, China
關鍵詞:
油井電潛泵溫度場結蠟剖面清蠟周期預測圖版
Keywords:
oil well electrical submersible pump temperature profile paraffin deposition profile paraffin removal cycle prediction chart
分類號:
TE358+.2
DOI:
10.13639/j.odpt.2018.06.024
文獻標志碼:
A
摘要:
渤海部分高含蠟油井投產后面臨比較嚴重的井筒結蠟問題,現場作業人員一般根據生產經驗確定清蠟周期,導致準確度低、清蠟作業成功率有限。根據海上油井生產管柱特征,以Ramey 溫度場計算數學模型為基礎,結合井筒結蠟速率模型計算得到了井筒結蠟剖面,推導建立了電潛泵井清蠟周期預測方法,并進一步繪制了某油田A 區塊清蠟周期和清蠟深度預測圖版。結果表明,清蠟周期隨產液量的下降呈冪函數形式變短,隨含水率增加呈指數函數形式增加。根據清蠟周期預測圖版,預測3 口井的清蠟周期分別為11 d、15 d、46 d,實際清蠟周期分別為8 d、12 d、39 d,預測結果與實際基本吻合。該方法同樣適用于陸地油田自噴井確定清蠟周期和清蠟深度,對高含蠟電潛泵井、自噴井及時制定清防蠟措施具有借鑒意義。
Abstract:
Some highly waxy oil wells in Bohai Sea were facing serious well paraffin deposition after putting into operation. Field workers used to determine paraffin removal cycles based on production experience, which led to low accuracy and limited success rate of paraffin removal operation. According to the characteristics of offshore oil well production strings and based on Ramey temperature field calculation mathematical model and wax deposition profile calculated by well wax deposition rate model, a prediction method for wax removal cycle of ESP wells is deduced and established, and a prediction chart for wax removal cycle and wax removal depth of block A in an oilfield is further drawn. The results show that the wax removal cycle decreases in power function form with the decrease of liquid yield and increases in exponential function form with the increase of water content. According to the prediction chart of wax removal cycle, the predicted wax removal cycles of three wells are 11 d, 15 d and 46 d respectively, and the actual wax removal cycles are 8 d, 12 d and 39 d respectively. The predicted results are basically consistent with the actual ones. This method can also be used to quickly and accurately determine the period and depth of paraffin removal in gushers in land oilfields. It has important guiding significance for timely formulation of paraffin removal and prevention measures in highly wax ESP wells and gushers.

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