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首页> 外文会议>SPE Latin American and Caribbean Petroleum Engineering Conference;LACPEC 2007 >Case History: Application of CHI Modeling?* Using Pulsed Neutron to Create Pseudo Openhole Logs in Highly Deviated Wells Using Special Techniques for Logging and Perforating in Veracruz, Mexico
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Case History: Application of CHI Modeling?* Using Pulsed Neutron to Create Pseudo Openhole Logs in Highly Deviated Wells Using Special Techniques for Logging and Perforating in Veracruz, Mexico

机译：案例历史：CHI建模的应用？*在墨西哥韦拉克鲁斯使用特殊技术进行测井和射孔，利用脉冲中子在高度偏斜的井中创建伪裸眼井测井

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The Veracruz basin, located in eastern Mexico, has sometimes been very difficult to evaluate with openhole wireline tools because over-pressured gas formations present a problem when trying to reach a balanced borehole condition. One of the fields was planned for development using nearly horizontal wells to maximize production, but acquiring openhole logs in these wells has proven to be difficult. Well A-21 is the first highly horizontal well to be completed using only LWD resistivity data in the nearly horizontal section. To assist in the evaluation after the well was completely drilled and cased, a pulsed neutron tool was logged across the entire well using a tractor device to reach the total depth of the well. An evaluation model for the A field was then developed using the CHI (cased hole interpretation) modeling program, by using the openhole resistivity and porosity data acquired in the vertical A-1 well, combined with the cased hole pulsed neutron data acquired across the same interval. Pseudo resistivity and porosity logs were then created for the A-21 well using only the pulsed neutron data acquired across the nearly horizontal section of the well, based on the Chi Model developed for the field. The pseudo resistivity was then compared to the LWD resistivity data acquired in the A- 21 well. Next, the interpretation was completed by defining the optimum perforating interval for the reservoir conditions and the mechanical condition of the well. After evaluating the interpretation, the On-Balance perforating technique using coiled tubing was decided upon as the optimum technique to perforate the A-21 well, to minimize reservoir damage. This paper will present the procedures used to evaluate and complete the A-21 and the A-31 wells, as well as a comparison of the CHI Modeling pseudo resistivity with the LWD resistivity measurement. The use of pulsed neutron logs to acquire pseudo openhole data is shown to be a valid alternative when drilling conditions do not permit normal data acquisition in openhole. The integration of the data obtained, along with applied reservoir geomechanics, for perforating design and production planning is shown to be a valid alternative to maximize production, and to prevent sanding and completion problems while reducing costs.
机译：位于墨西哥东部的韦拉克鲁斯盆地有时很难用裸眼井下电缆工具进行评估，因为在试图达到平衡的井眼条件时，超压气层会带来问题。已计划使用近水平井来开发其中一个油田，以最大程度地提高产量，但事实证明，在这些井中采集裸眼测井很困难。 A-21井是仅在近水平段仅使用随钻测井电阻率数据完井的第一口高水平井。为了在井完全钻进并装套管后进行评估，使用牵引装置将脉冲中子工具记录在整个井上，以达到井的总深度。然后，使用CHI（套管井解释）建模程序，通过使用在垂直A-1井中采集的裸眼电阻率和孔隙率数据，以及在同一井中采集的套管井脉冲中子数据，开发了A场评估模型间隔。然后，根据为该领域开发的Chi模型，仅使用在井中几乎水平截面上采集的脉冲中子数据为A-21井创建了伪电阻率和孔隙率测井曲线。然后将假电阻率与在A-21井中获得的随钻测井电阻率数据进行比较。接下来，通过为储层条件和井的机械条件定义最佳射孔间隔来完成解释。在评估了解释之后，决定使用连续油管的“平衡上”射孔技术作为对A-21井进行射孔的最佳技术，以最大程度地减少储层的损害。本文将介绍用于评估和完井A-21和A-31井的程序，以及将CHI Modeling伪电阻率与LWD电阻率测量结果进行比较。当钻井条件不允许在裸眼中进行常规数据采集时，使用脉冲中子测井仪获取伪裸眼井数据被证明是一种有效的选择。事实证明，将获得的数据与应用的油藏地质力学相结合，以便进行射孔设计和生产计划，是最大程度提高产量，防止打磨和完井问题，同时降低成本的有效选择。

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