胍胶稠化剂对低渗透砂岩气藏储层伤害的实验研究
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河北省廊坊市中国石油勘探开发研究院廊坊分院渗流所,河北省廊坊市中国石油勘探开发研究院廊坊分院渗流所

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TE348

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中国石油天然气股份有限公司基础研究项目“油层物理与化学渗流基础研究”(编号2008A1402)资助


Experimental study on the damage caused by thickener of guanidine gum of low permeability sandstone gas reservoir
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Based on the project "Basical research on petrophysics and chemical seepage" of PetroChina Company Limited

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    摘要:

    为了定量分析胍胶压裂液稠化剂分子对低渗透砂岩气藏储层的伤害情况,借助平行样比对方法,通过基质伤害实验和滤饼伤害实验,对目标储层10块(各5块)代表性岩心进行了研究。研究表明,在气相反排至50PV时,稠化剂分子造成的伤害(堵塞伤害和滤饼伤害)是主要伤害因素(占总伤害的51.15%)。此外,堵塞伤害先是随着反排体积增加而增大,而后趋于稳定;滤饼伤害是不可逆不可恢复的伤害。并且,堵塞伤害与阈压喉道半径和有效喉道半径均值大小成线性正相关关系。

    Abstract:

    In order to quantitatively analyze the damage caused by thickener molecule of guanidine gum fracturing fluid of the low permeability sandstone gas reservoir, this research has done matrix damage experiment and filter cake damage experiment by using parallel samples comparison method on 10 representative cores(5 cores for each experiment). Research shows that, the damage caused by thickener molecule of guanidine gum is the main damage factor (51.15% of the total damage) when gas reverse discharging to 50PV. Besides, firstly, the blocking damage increases with the discharge volume increased, then tends to be stable, while, the filter cake damage is irreversible unrecoverable harm which doesn’t change with the discharge volume. In addition, the blocking damage makes a positive linear correlation with threshold pressure throat radius and the mean size of effective throat radius.

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郭和坤,朱琪. 胍胶稠化剂对低渗透砂岩气藏储层伤害的实验研究[J]. 科学技术与工程, 2015, 15(22): .
GUO He-kun,朱琪. Experimental study on the damage caused by thickener of guanidine gum of low permeability sandstone gas reservoir[J]. Science Technology and Engineering,2015,15(22).

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  • 收稿日期:2015-04-13
  • 最后修改日期:2015-04-13
  • 录用日期:2015-05-11
  • 在线发布日期: 2015-08-11
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