本文關鍵詞：通道壓裂中流動通道形態(tài)影響因素實驗研究　出處：《油氣地質與采收率》2017年05期 　論文類型：期刊論文

  更多相關文章： 通道壓裂 流動通道 支撐劑輸送 纖維 脈沖單元注入?yún)?shù)

【摘要】：通道壓裂是低滲透致密油氣藏高效、低成本開發(fā)的關鍵技術,其關鍵是在水力裂縫中形成供油氣流動的暢通通道網(wǎng)絡,但目前針對通道壓裂支撐劑鋪置形態(tài)、流動通道特征研究尚處于起步階段。通過大型平板裂縫可視裝置,開展通道壓裂支撐劑動態(tài)輸送實驗研究,分析纖維、壓裂液、支撐劑、泵注排量和脈沖時間對支撐劑輸送和流動通道形態(tài)的影響。實驗結果表明:纖維和壓裂液決定能否在支撐裂縫中獲得流動通道,而泵注排量和脈沖時間對流動通道形態(tài)有較大影響,而支撐劑密度和粒徑對流動通道形態(tài)幾乎無影響;胍膠分子鏈纏繞在纖維表面,使得纖維網(wǎng)狀結構范圍增大、強度增強,兩者共同提高了攜砂液脈沖段在輸送過程中的穩(wěn)定性;流動通道類型可以分為3類,且流動通道形態(tài)受到泵注排量和脈沖時間乘積的控制。當脈沖單元注入?yún)?shù)為2.5~5.0 L時,形成的高速通道形態(tài)最優(yōu),支撐裂縫導流能力最大。
[Abstract]:Channel fracturing is a key technology for the development of high efficiency and low cost oil and gas reservoirs with low permeability. The key point is to form an unblocked channel network for oil and gas flow in hydraulic fractures, but at present, it is aimed at the configuration of channel fracturing proppant. The study of flow channel characteristics is still in its infancy. Through the large plate fracture visual device, the experimental research of channel fracturing proppant dynamic transportation is carried out, and the fiber, fracturing fluid and proppant are analyzed. The effect of pump flow rate and pulse time on proppant transportation and flow channel morphology. The experimental results show that fiber and fracturing fluid determine whether the flow channel can be obtained in the supporting fracture. However, pump discharge and pulse time have great influence on the flow channel morphology, while the density and particle size of proppant have little effect on the flow channel morphology. The molecular chain of guanidine gel is wound on the surface of the fiber, which increases the range of the fiber network structure and the strength of the fiber. Both of them improve the stability of the sand carrying liquid pulse section in the process of transportation. The flow channel type can be divided into three types, and the flow channel configuration is controlled by the pump discharge and pulse time product. When the pulse unit injection parameter is 2.5 渭 L, the high speed channel configuration is optimal. The supporting crack has the largest conductivity.
【作者單位】： 西南石油大學油氣藏地質及開發(fā)工程國家重點實驗室;
【基金】：國家自然科學基金杰出青年基金項目“低滲致密油氣藏壓裂酸化”(51525404) 國家科技重大專項“脈沖纖維加砂壓裂增產(chǎn)機理及技術研究”(2016ZX05048-004)和“低滲砂巖儲層提高壓裂裂縫復雜程度工藝技術研究”(2016ZX05006-002) 油氣藏地質及開發(fā)工程國家重點實驗室開放基金“頁巖氣清水壓裂支撐劑沉降動力學行為的CFD-DEM模型研究”(PLN1431)
【分類號】：TE357.1
【正文快照】： 隨著油氣田勘探開發(fā)的深入,低滲透、特低滲透油氣藏在整個油氣產(chǎn)量中所占的比重越來越大。如美國2015年致密油年產(chǎn)量達2.59×108t/a,占其石油年產(chǎn)量的45%;非常規(guī)氣年產(chǎn)量達4 500×108m3/a,占其天然氣年產(chǎn)量的50%[1]。同樣,低滲透油氣藏也是中國重要的油氣藏類型。新增天然氣探

【相似文獻】

相關期刊論文 前2條

1 谷建偉;張秀梅;鄭家朋;樊兆亞;;基于無因次壓降曲線的注水優(yōu)勢流動通道識別方法[J];中國石油大學學報(自然科學版);2011年05期

2 崔仕提;鐘軍;趙冀;;無因次壓降曲線法識別優(yōu)勢流動通道在LN210井的應用[J];中國石油和化工標準與質量;2012年11期

，

本文編號：1434831