冀东油田固相控制技术优化

Study and Application of Optimized Solids Control Technologies in Jidong Oilfield

冀东油田各区块的目的层位和所用钻井液各不相同,井深和井型也有较大差异,在实际钻井过程中均存在固相含量和膨润土含量偏高,导致钻井液增稠、钻速降低、钻具黏卡、测井阻卡等问题的出现。通过调研油田各区块钻井液固相、膨润土含量和固控设备配套及使用现状,分析了各区块地层特性、钻井液体系和固相控制配备、使用等因素对钻井液固相控制的影响,制定了针对性的固相控制工艺技术,主要包括确定了各区块固相含量和膨润土含量控制指标,钻井液的配制及转换、钻进中固相含量控制和固控设备使用规范。通过在高尚堡区块7口井中的对比应用,发现G76-65和G76-61井在钻井液配制、大分子处理剂加入和固控设备使用方面严格执行固相控制技术,钻井液性能良好,测井一次成功。实践证明,该套技术的推广应用有利于油田钻井施工提速、提效、提质。

Each block in Jidong Oilfield has different target zones,well depths and well types,and the drilling fluids used in drilling the target zones are also different.Drilling fluids used in drilling operations had solids content and content of bentonite that were higher than necessary.The high contents of solids and bentonite led to a series of problems such as highly viscosified drilling fluid,reduced ROP,differential pipe sticking,and sticking of wireline logging tools etc.To resolve these problems,solids contents and bentonite contents o f the drilling fluids used,the configuration and use of solids control equipment(SCE)in each block were investigated,and the effects o f formation characteristics,drilling fluid formulation,and the configuration and use of SCE on the control o f solids content in drilling fluid were analyzed.Technologies targeted at the specific requirement of solids control was prepared,mainly including the maximum solids and bentonite contents allowed,rules for formulating and converting drilling fluids,and rules for solids control and use of SCE during drilling operations.These technologies have been used on the well G76-65 and the well G76-61 in the block Gaoshangpu.Compared with other 5 wells drilled nearby,it was found that from mud formulation,the addition o f polymer additives to the use of SCE,the technologies mentioned above were strictly applied on the two wells.And correspondingly,the properties of the drilling fluids used on these two wells were pretty good,and wireline logging jobs were successful in the first try.Field practices have proven that the optimized solids control technologies are beneficial to the fast,efficient and quality drilling operations.