Complex sentence: There was also the problem of the encountering other loss zones such as those experienced by the appraisal wells, which was overcome through a combination of strict control of the drilling and its location, along with careful analysis of the various geological variables.
Split into simpler sentences: There was also the problem of the encountering other loss zones such as those experienced by the appraisal wells. These problems were overcome through a combination of strict control of the drilling and its location, along with careful analysis of the various geological variables.