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富安1-1井是油田在海安地区布置的一口评价直井,目的是进一步探明海安地区的可采储量。该地区上部棕色软泥岩地层易发生缩径,下部地层深灰色硬脆性泥岩易垮塌掉块,因此要求富安1-1井钻井液具有良好的抑制性和抗污染能力。而胺基钻井液体系具有优良的抑制性和抗污染能力,特别对于大段泥页岩地层、伊蒙混层、蒙脱石含量高等强水敏性地层具有良好的抑制性能,且能通过提高钻井液抑制性来阻止井壁失稳的发生。该钻井液体系由于其极强的抑制性,目前已经在国外广泛应用。
The well of Fu’an 1-1 is a vertical well appraised by the oilfield in Haian area to further explore recoverable reserves in Haian area. The upper brown ooze formations in the area tend to shrink in size, and the dark gray hard brittle mudstones in the lower formations are prone to collapsing. Therefore, drilling fluids from Fu’an 1-1 well are required to have good inhibiting and anti-pollution capabilities. The amine-based drilling fluid system has excellent inhibition and anti-pollution ability, especially for large shale formations, Yimeng mixed layer, with high content of montmorillonite strong water-sensitive formations have good inhibitory properties, and can improve the drilling Inhibition of liquid to prevent the instability of the borehole. The drilling fluid system has been widely used in foreign countries due to its extremely strong inhibition.