Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Chemical additive</td><td class="align_center">Manufacturer</td><td class="align_center">Purity</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Emulsifying agent (EM-JH, EM-SL), filtrate reducers (FR-JH, lignite-SL), lubricant (Jiahua)</td><td class="align_center">Jiahua Technology Co., Ltd.</td><td class="align_center">Technical purity</td></tr><tr><td class="align_left">CaCO<sub>3</sub>, NaCl, CaCl<sub>2</sub></td><td class="align_center">Sinopharm Group Chemical Reagent Co., Ltd.</td><td class="align_center">Analytical purity</td></tr><tr><td class="align_left">Emulsifying agent (EM-XG)</td><td class="align_center">Tianjin Xiongguan Technology Co., Ltd.</td><td class="align_center">Technical purity</td></tr><tr><td class="align_left">Filtrate reducers (FR-BK), N-plugging agent</td><td class="align_center">Baker Hughes</td><td class="align_center">Technical purity</td></tr><tr><td class="align_left">Plugging agent (YX1200, YX400)</td><td class="align_center">Chengdu Xiyouhuawei Science &amp; Technology Co., Ltd.</td><td class="align_center">Technical purity</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Various chemical additives used in the experiments and corresponding manufacturers.</div>

Geofluids

tab1

Table 1

Table 1: Oil-Based Drilling Fluid Plugging Method for Strengthening Wellbore Stability of Shale Gas 