doe eia dis tri bu tion cate gory natural gas productive capacity for the lower 48 states 1986 through 1998 december 1997 energy information administration office of oil and us department washington dc 20585 this re port was pre pared by en ergy in ma ad min istra de pend ent sta tis ti cal ana lyti agency within part ment con tained herein should not be strued as vo cat ing or flect any pol icy po si o r other gani za preface is sixth series reports prepared five previous were published 1991 1993 1994 1996 1 2 3 4 5 dallas field has earlier regarding ga s these deliverability flow surveillance fields reported data selected