砾岩油藏三元复合驱中碳酸钠与无机矿物消耗影响因素研究

doi:10.11962/1006-4990.2020-0019

Abstract

Abstract:

The sodium carbonate was used as the source of alkali in the Xinjiang Oilfield ASP （alkaline-surfactant-polymer） flooding.Aiming at the charateristic of the components of inorganic mineral,crude oil and underground water in the area,the study on consumption of sodium carbonate was made.The results showed that the inorganic clay minerals in conglomerate reservoir had strong adsorption to sodium carbonate in ASP flooding system,in which the montmorillonite was the strongest adsorbent for polymers followed by chlorite,illite and feldspar,and the adsorbability of quartz sand was lowest.The static adsorption results showed that the adsorption of sodium carbonate on loose cores was greater than that on cemented cores.With the decrease of permeability the dynamic adsorption capacity of sodium carbonate decreased gradually.The miscellaneous groups consumed sodium carbonate much more.The crude oil acid value of the block is lower,and the loss of chemical reaction between the sodium carbonate and the crude oil was less; the divalent cation in the formation water of the block were lower,and the consumption of sodium carbonate was also less.

Key words: Xinjiang Oilfield, conglomerate reservoir, inorganic mineral, sodium carbonate

CLC Number:

TQ127.13

Hou Junwei,Hui Zeyou,Chen Zijing,Song Qi,Huang Bingxuan,Chen Mengmeng. Study on influencing factors of consumption of sodium carbonate and inorganic mineral in ASP flooding of conglomerate reservoirs[J]. Inorganic Chemicals Industry, 2020, 52(11): 16-19.

Figures/Tables 8

References 10

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岩心编号	长度/ cm	直径/ cm	气测渗透率/mD	水测渗透率/mD	孔隙体积/mL	孔隙度/ %
1	5.9	3.8	194.83	92.17	11.34	16.95
2	5.9	3.8	326.65	175.29	8.59	17.61
3	5.9	3.8	669.24	362.68	13.37	21.01
4	5.9	3.8	818.58	462.71	14.57	24.24

原油黏度/ （mPa·s）	w （蜡）/ %	酸值/ （mg·g^-1）	原油族组分分析/%				总收率/%
原油黏度/ （mPa·s）	w （蜡）/ %	酸值/ （mg·g^-1）	w（饱和烃）	w（芳香烃）	w （胶质）	w（沥青质）	总收率/%
12.2	5.22	0.122	66.57	6.16	6.45	1.47	80.65

ρ（HCO₃^-）/ （mg·L^-1）	ρ（Cl^-）/ （mg·L^-1）	ρ（SO₄^2-）/ （mg·L^-1）	ρ（Ca²⁺）/ （mg·L^-1）	ρ（Mg²⁺）/ （mg·L^-1）
4 913.32	3 295.32	248.6	25.31	15.35
ρ（K⁺+Na⁺）/（mg·L^-1）	矿化度/ （mg·L^-1）	pH	水样类型
4 050.91	12 458.8	7.95	NaHCO₃

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Inorganic Acid-Base-Salt Committee of CIESC

Study on influencing factors of consumption of sodium carbonate and inorganic mineral in ASP flooding of conglomerate reservoirs

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