【摘要】：隨著遼河油田勘探開發(fā)程度的深入,許多低壓低滲油氣藏逐漸被開發(fā);同時(shí)由于進(jìn)入開發(fā)后期,地層虧空嚴(yán)重,鉆進(jìn)時(shí)極易發(fā)生嚴(yán)重漏失,不僅損害儲(chǔ)層,還嚴(yán)重影響了鉆井施工進(jìn)度;長(zhǎng)城鉆探工程院開發(fā)的可循環(huán)微泡沫鉆井液在一定程度上解決了在低壓易漏失地層遇到的嚴(yán)重漏失問題,并很好地保護(hù)了油氣層,具有很高的經(jīng)濟(jì)效益和社會(huì)效益。在茨采、沈采的潛山裂縫性油藏中,為保護(hù)儲(chǔ)層,使用無固相水基可循環(huán)微泡沫體系,但現(xiàn)場(chǎng)應(yīng)用表明:潛山儲(chǔ)層一般埋藏較深,地層溫度高,原微泡沫體系穩(wěn)定性達(dá)不到要求。針對(duì)遼河油田之前應(yīng)用的無固相可循環(huán)微泡沫穩(wěn)泡劑抗溫能力不夠,在深井高溫條件下,穩(wěn)泡劑、發(fā)泡劑降解速度加快,穩(wěn)泡時(shí)間短、增粘降濾失劑降失水效果不理想、抗溫性能不強(qiáng)等實(shí)際問題,篩選出了可抗150℃高溫的發(fā)泡劑、穩(wěn)泡劑、與之匹配的降濾失劑,并對(duì)配方進(jìn)行調(diào)整,使其具有合理的鉆井液流變性能和抗溫性能,穩(wěn)泡時(shí)間從原來的0.5h提高到3h,濾失量從原來的15mL降至5mL,鉆井液密度降低到0.90g/cm3時(shí),泥漿泵上水正常、儀器信號(hào)正常。抗高溫?zé)o固相可循環(huán)微泡沫鉆井液的研發(fā)解決了泡沫穩(wěn)定性問題、鉆井泵上水問題、潛山深層裂縫性油氣藏井漏問題,擴(kuò)大了微泡沫鉆井液應(yīng)用范圍,前景廣闊。
[Abstract]:With the development of Liaohe Oilfield, many low pressure and low permeability reservoirs have been developed. At the same time, because of the serious formation deficit in the late stage of development, it is easy to occur serious leakage during drilling, which not only damages the reservoir, but also seriously affects the drilling construction progress. The circulating microfoam drilling fluid developed by the Great Wall drilling Engineering Institute solves the serious leakage problem in low pressure and easy to lose formation to some extent, and protects oil and gas reservoir well, which has high economic and social benefits. In order to protect the reservoir in the fractured buried hill reservoirs produced in ci and Shen, no solid phase water based circulating microfoam system is used. However, the field application shows that the buried hill reservoirs are generally buried deep and the formation temperature is high. The stability of the original microfoam system could not meet the requirements. In Liaohe Oilfield, the temperature resistance of the non-solid circulating microfoam foam stabilizer is not enough. Under the conditions of high temperature in deep wells, the degradation rate of foam stabilizer and foaming agent is accelerated, the time of foam stabilization is short, and the effect of viscosity and filtration loss agent on reducing water loss is not ideal. Some practical problems, such as low temperature resistance, were used to screen foaming agent, foaming stabilizer and matching filter reducer, which could resist 150 鈩，

本文編號(hào)：2334584