本文關(guān)鍵詞：深水氣井測試水合物生成的預(yù)測及防治　出處：《西安石油大學(xué)學(xué)報(自然科學(xué)版)》2017年06期 　論文類型：期刊論文

  更多相關(guān)文章： 深水氣井 水合物 井筒溫度 井筒壓力 探井測試

【摘要】：深水氣井測試時,海水段較長且溫度較低,天然氣容易在泥線至海平面之間形成水合物,堵塞井筒,導(dǎo)致測試失敗。建立深水氣井井筒溫度-壓力模型,模擬南海西部某深水探井測試制度,求解得到井筒流體溫度、壓力分布;對該區(qū)域天然氣樣進(jìn)行水合物生成實(shí)驗(yàn),得到天然氣水合物生成臨界條件。結(jié)合測試模擬結(jié)果,認(rèn)為溫度是影響水合物生成的主要因素且常規(guī)測試過程中該井會在泥線附近生成水合物。隔熱油管能夠降低井筒整體傳熱系數(shù),提升流體溫度,模擬顯示采用隔熱油管后流體溫度整體升高30℃左右,不同產(chǎn)量下測試均不會生成水合物,能夠保證測試順利進(jìn)行,該井實(shí)測情況也證實(shí)了這一預(yù)測。實(shí)測不同產(chǎn)量下井口溫壓數(shù)據(jù)與模擬結(jié)果對比,誤差均小于5%,證明了模型的準(zhǔn)確性,表明該方法能夠?yàn)樯钏畾饩疁y試過程中水合物預(yù)測和防治提供依據(jù)。
[Abstract]:When testing deep water gas wells, the sea water section is longer and the temperature is lower, the natural gas is easy to form hydrate between the mud line and sea level, which leads to the failure of testing, and establishes the temperature and pressure model of the well bore of deep water gas wells. The testing system of a deep water exploration well in the western part of the South China Sea is simulated and the temperature and pressure distribution of the wellbore fluid is obtained. The critical conditions of gas hydrate formation were obtained by gas hydrate formation experiments in this region. The test results were combined with the simulation results. It is considered that temperature is the main factor affecting the formation of hydrates and during the routine testing the hydrates will be formed in the vicinity of the mud line. The heat insulation tubing can reduce the overall heat transfer coefficient of the wellbore and raise the temperature of the fluid. The simulation results show that the temperature of the fluid increases about 30 鈩，

本文編號：1434538