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首页> 外文会议>SPE/IADC Middle East Drilling Technology Conference and Exhibition >Remediation of Severly Damaged wells using Mesophase Technology: Case Histories, Saudi Arabia
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Remediation of Severly Damaged wells using Mesophase Technology: Case Histories, Saudi Arabia

机译：使用中共技术来修复严重受损的井：案例历史，沙特阿拉伯

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Formation damage is a by-product of drilling, completion and production process and is attributed to many factors. In open-hole (OH) and cased-hole (CH) wells, hydrocarbon flow may be impeded by various damaging mechanisms caused by drilling and completion fluids, in-situ emulsions, water block, organic deposition and oily debris left downhole. Mesophase fluids have been successfully developed to effectively resolve the persistent problem of near-wellbore damage. The physical-chemical properties of the mesophase systems include high oil solubilization, high diffusion coefficients through porous media and the reduction of interfacial tension between organic and aqueous phases to near zero, making them excellent candidates for removing formation damage. The chemistry of mesophase fluids makes the systems excellent choices for superior synthetic or oil-based mud (S/OBM) displacements in casing and for OBM filter cake cleanup in open-hole completion applications. Mesophase fluids are thermodynamically-stable, optically transparent solutions composed of two immiscible fluids. They differ from ordinary emulsions because they can be prepared with little or no mechanical energy input. They are typically composed of a non-polar or oil phase, an aqueous phase, surfactant(s) and an optional co-surfactant. Depending on how they are formulated, they can exist in a single-phase or in a three-phase system, in which the middle-phase microemulsion is in equilibrium with excess water and oil. The formulation characteristics, phase type, and ultimately, the cleaning efficiency of a microemulsion is dictated by the hydrophilic-lipophilic balance between the surfactant(s) and the physico-chemical environment. The microemulsions described in the study are single-phase where oil and water are co-solubilized by the surfactant(s) and co-surfactants. The water/oil interface has a zero or near-zero curvature, indicative of the bicontinuous phase geometry that produces very low interfacial tension and the rapid solubilization of oil upon contact.
机译：形成损坏是钻孔，完成和生产过程的副产品，并归因于许多因素。在开孔（OH）和套管（CH）孔中，可以通过钻孔和完井流体，原位乳液，水块，有机沉积和油性碎片留下的各种损伤机制来阻抗烃流。中间相液已成功开发，以有效地解决近井眼损伤的持续问题。中间体系的物理化学性质包括高油溶性，通过多孔介质的高扩散系数，以及减少有机和水相之间的界面张力至零附近，使其成为除去形成损伤的优异候选者。中间相流体的化学性能使系统用于壳体中的优质合成或油基泥浆（S / OBM）位移的优异选择，以及OBM滤饼清理在开孔完成应用中。中间相液是热力学稳定的，光学透明溶液由两个不混溶的流体组成。它们与普通乳液不同，因为它们可以用很少或没有机械能输入来制备。它们通常由非极性或油相，水相，表面活性剂和任选的共表面活性剂组成。取决于它们的配制方式，它们可以在单相或三相系统中存在，其中中相微乳液处于含水和油状的平衡。制剂特性，相型，最终，微乳液的清洁效率由表面活性剂和物理化学环境之间的亲水性 - 亲脂性平衡决定。研究中描述的微乳液是单相，其中油和水通过表面活性剂和共表面活性剂共溶。水/油界面具有零或接近零曲率，指示在接触时产生非常低的界面张力和油的快速增溶化。

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