Trace element geochemical characteristics of plants and their influence on the remote-sensing spectral properties in the North Jiangsu oil field

This paper presents the contents of 17 kinds of trace elements in plant leaf samples collected from 4 sections in the North Jiangsu oil field, and the dada on their visible-near infrared spectra. By comparing the results of the inner and outer oil-gas remote-sensing anomaly areas, the plant trace element composition, and the enrichment characteristics and their influence on the plant spectral properties are described. The results indicated that the plant leaves had very strong enrichment ability toward some elements such as Mg, Ca, K, Na, Fe, Al, Mn, V, Zn and Cr. The plant leaves from the oil-gas abnormal areas were enriched in trace elements of the Fe-series, but depleted in alkali and alkali-earth metal elements. The plant trace elements had a strong influence on the 'blue-shift' strength and the reflectance of visible bands. And the ratios between Fe, Co and K, Na, Cd, Cu, Ba are the effective remote-sensing oil-indicating factors of plant trace elements. plant trace element, geochemistry, remote

草舍油田CO_2泡沫驱油起泡剂的选择

苏北草舍水驱油田CO2气驱先导试验效果不佳，转而采用CO2泡沫驱。本文报道起泡剂选择。所选起泡荆YFP-1是一种商品季铵盐类表面活性荆，在矿化度17．2g／L的模拟回注污水中配成1．5％溶液，用丝网搅动法考察起泡体积、泡沫半衰期、耐油性、耐温性，均可满足该油田泡沫驱要求，最佳pH值为6～7。在渗透率4．82×10^-3。和0．72×10^-3心的～5cm长不合油石英砂填砂管上，测定水驱、1：1CO2泡沫驱、水驱压差，求得CO2泡沫的阻力系数分别为2．78和2．40，残余阻力系数分别为1．64和2．16。图1表4参2。

伴生轻质油制高效乳液型清蜡剂研究与性能评价

针对苏北油区原油含蜡量高、井筒频繁卡蜡的问题,在原油物性特征分析的基础上,以苏北某气田伴生轻质原油为溶剂,研制出适用于苏北油区的高效乳液型清蜡剂。结果表明:苏北原油具备含蜡量在28.1%~39.45%之间,凝固点介于30~46℃之间,析蜡点近50℃等特征。以伴生轻质油、混合二甲苯、100#溶剂油按质量比为2∶5∶3组成的混合溶液为有机溶剂,以质量比为6∶4的油溶性表面活性剂(Span80)与水溶性表面活性剂(OP-10)为乳化剂,复配制得适用于苏北油区油井的高效乳液型清蜡剂。矿场实践表明该乳液型清蜡剂应用效果较好。